diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index a92044f15b78..e0be41f2022b 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -68,6 +68,10 @@ jobs:
         uses: actions/setup-python@v5
         with:
           python-version: ${{ matrix.python-version }}
+      - name: Explicitly install packages for Azure Cosmos DB
+        run: |
+          pip install azure-cosmos
+          pip install pytest-asyncio
       - name: Install packages and dependencies
         run: |
           python -m pip install --upgrade pip wheel
diff --git a/.github/workflows/contrib-openai.yml b/.github/workflows/contrib-openai.yml
index 7e8fb0033177..94620b90fb3e 100644
--- a/.github/workflows/contrib-openai.yml
+++ b/.github/workflows/contrib-openai.yml
@@ -57,6 +57,10 @@ jobs:
           pip install -e .
           python -c "import autogen"
           pip install pytest-cov>=5 pytest-asyncio
+      - name: Explicitly install packages for Azure Cosmos DB
+        run: |
+          pip install azure-cosmos
+          pip install pytest-asyncio
       - name: Install packages for test when needed
         run: |
           pip install docker
diff --git a/.github/workflows/contrib-tests.yml b/.github/workflows/contrib-tests.yml
index 3abe257dfad6..2b0a37167e1e 100644
--- a/.github/workflows/contrib-tests.yml
+++ b/.github/workflows/contrib-tests.yml
@@ -40,6 +40,10 @@ jobs:
         uses: actions/setup-python@v5
         with:
           python-version: ${{ matrix.python-version }}
+      - name: Explicitly install packages for Azure Cosmos DB
+        run: |
+          pip install azure-cosmos
+          pip install pytest-asyncio
       - name: Install packages and dependencies for all tests
         run: |
           python -m pip install --upgrade pip wheel
@@ -97,6 +101,10 @@ jobs:
         uses: actions/setup-python@v5
         with:
           python-version: ${{ matrix.python-version }}
+      - name: Explicitly install packages for Azure Cosmos DB
+        run: |
+          pip install azure-cosmos
+          pip install pytest-asyncio
       - name: Install packages and dependencies for all tests
         run: |
           python -m pip install --upgrade pip wheel
@@ -147,6 +155,10 @@ jobs:
         uses: actions/setup-python@v5
         with:
           python-version: ${{ matrix.python-version }}
+      - name: Explicitly install packages for Azure Cosmos DB
+        run: |
+          pip install azure-cosmos
+          pip install pytest-asyncio
       - name: Install packages and dependencies for all tests
         run: |
           python -m pip install --upgrade pip wheel
@@ -176,6 +188,10 @@ jobs:
         uses: actions/setup-python@v5
         with:
           python-version: ${{ matrix.python-version }}
+      - name: Explicitly install packages for Azure Cosmos DB
+        run: |
+          pip install azure-cosmos
+          pip install pytest-asyncio
       - name: Install packages and dependencies for all tests
         run: |
           python -m pip install --upgrade pip wheel
@@ -211,6 +227,10 @@ jobs:
         uses: actions/setup-python@v5
         with:
           python-version: ${{ matrix.python-version }}
+      - name: Explicitly install packages for Azure Cosmos DB
+        run: |
+          pip install azure-cosmos
+          pip install pytest-asyncio
       - name: Install packages and dependencies for all tests
         run: |
           python -m pip install --upgrade pip wheel
@@ -246,6 +266,10 @@ jobs:
         uses: actions/setup-python@v5
         with:
           python-version: ${{ matrix.python-version }}
+      - name: Explicitly install packages for Azure Cosmos DB
+        run: |
+          pip install azure-cosmos
+          pip install pytest-asyncio
       - name: Install packages and dependencies for all tests
         run: |
           python -m pip install --upgrade pip wheel
@@ -283,6 +307,10 @@ jobs:
         uses: actions/setup-python@v5
         with:
           python-version: ${{ matrix.python-version }}
+      - name: Explicitly install packages for Azure Cosmos DB
+        run: |
+          pip install azure-cosmos
+          pip install pytest-asyncio
       - name: Install packages and dependencies for all tests
         run: |
           python -m pip install --upgrade pip wheel
@@ -327,6 +355,10 @@ jobs:
         uses: actions/setup-python@v5
         with:
           python-version: ${{ matrix.python-version }}
+      - name: Explicitly install packages for Azure Cosmos DB
+        run: |
+          pip install azure-cosmos
+          pip install pytest-asyncio
       - name: Install packages and dependencies for all tests
         run: |
           python -m pip install --upgrade pip wheel
@@ -475,6 +507,10 @@ jobs:
         uses: actions/setup-python@v5
         with:
           python-version: ${{ matrix.python-version }}
+      - name: Explicitly install packages for Azure Cosmos DB
+        run: |
+          pip install azure-cosmos
+          pip install pytest-asyncio
       - name: Install packages and dependencies for all tests
         run: |
           python -m pip install --upgrade pip wheel
@@ -515,6 +551,10 @@ jobs:
         uses: actions/setup-python@v5
         with:
           python-version: ${{ matrix.python-version }}
+      - name: Explicitly install packages for Azure Cosmos DB
+        run: |
+          pip install azure-cosmos
+          pip install pytest-asyncio
       - name: Install packages and dependencies for all tests
         run: |
           python -m pip install --upgrade pip wheel
@@ -555,6 +595,10 @@ jobs:
         uses: actions/setup-python@v5
         with:
           python-version: ${{ matrix.python-version }}
+      - name: Explicitly install packages for Azure Cosmos DB
+        run: |
+          pip install azure-cosmos
+          pip install pytest-asyncio
       - name: Install packages and dependencies for all tests
         run: |
           python -m pip install --upgrade pip wheel
diff --git a/.github/workflows/samples-tools-tests.yml b/.github/workflows/samples-tools-tests.yml
index e774e5cb0b1f..2a10aa2ea967 100644
--- a/.github/workflows/samples-tools-tests.yml
+++ b/.github/workflows/samples-tools-tests.yml
@@ -33,6 +33,10 @@ jobs:
         uses: actions/setup-python@v5
         with:
           python-version: ${{ matrix.python-version }}
+      - name: Explicitly install packages for Azure Cosmos DB
+        run: |
+          pip install azure-cosmos
+          pip install pytest-asyncio
       - name: Install packages and dependencies for all tests
         run: |
           python -m pip install --upgrade pip wheel
diff --git a/autogen/logger/__init__.py b/autogen/logger/__init__.py
index c30711940c99..6901b3d36400 100644
--- a/autogen/logger/__init__.py
+++ b/autogen/logger/__init__.py
@@ -1,5 +1,6 @@
+from .cosmos_db_logger import CosmosDBLogger
 from .file_logger import FileLogger
 from .logger_factory import LoggerFactory
 from .sqlite_logger import SqliteLogger
 
-__all__ = ("LoggerFactory", "SqliteLogger", "FileLogger")
+__all__ = ("LoggerFactory", "SqliteLogger", "FileLogger", "CosmosDBLogger")
diff --git a/autogen/logger/cosmos_db_logger.py b/autogen/logger/cosmos_db_logger.py
new file mode 100644
index 000000000000..6c2c8b6943b8
--- /dev/null
+++ b/autogen/logger/cosmos_db_logger.py
@@ -0,0 +1,176 @@
+from __future__ import annotations
+
+import logging
+import queue
+import threading
+import uuid
+from typing import TYPE_CHECKING, Any, Dict, Optional, TypedDict, Union
+
+from azure.cosmos import CosmosClient, exceptions
+from azure.cosmos.exceptions import CosmosHttpResponseError
+from openai import AzureOpenAI, OpenAI
+from openai.types.chat import ChatCompletion
+
+from autogen.logger.base_logger import BaseLogger
+from autogen.logger.logger_utils import get_current_ts, to_dict
+
+if TYPE_CHECKING:
+    from autogen import Agent, ConversableAgent, OpenAIWrapper
+
+__all__ = ("CosmosDBLogger",)
+
+logger = logging.getLogger(__name__)
+
+
+class CosmosDBLoggerConfig(TypedDict, total=False):
+    connection_string: str
+    database_id: str
+    container_id: str
+
+
+class CosmosDBLogger(BaseLogger):
+
+    log_queue: queue.Queue[Optional[Dict[str, Any]]] = queue.Queue()
+
+    def __init__(self, config: CosmosDBLoggerConfig):
+        required_keys = ["connection_string", "database_id", "container_id"]
+        if not all(key in config for key in required_keys):
+            raise ValueError("Missing required configuration for Cosmos DB Logger")
+
+        self.config = config
+        self.client = CosmosClient.from_connection_string(config["connection_string"])
+        self.database_id = config.get("database_id", "autogen_logging")
+        self.database = self.client.get_database_client(self.database_id)
+        self.container_id = config.get("container_id", "Logs")
+        self.container = self.database.get_container_client(self.container_id)
+        self.session_id = str(uuid.uuid4())
+        self.log_queue = queue.Queue()
+        self.logger_thread = threading.Thread(target=self._worker, daemon=True)
+        self.logger_thread.start()
+
+    def start(self) -> str:
+        try:
+            self.database.create_container_if_not_exists(id=self.container_id, partition_key="/session_id")
+        except exceptions.CosmosHttpResponseError as e:
+            logger.error(f"Failed to create or access container {self.container_id}: {e}")
+        return self.session_id
+
+    def _worker(self) -> None:
+        while True:
+            item = self.log_queue.get()
+            if item is None:  # None is a signal to stop the worker thread
+                self.log_queue.task_done()
+                break
+            try:
+                self._process_log_entry(item)
+            except Exception as e:
+                logger.error(f"Error processing log entry: {e}")
+            finally:
+                self.log_queue.task_done()
+
+    def _process_log_entry(self, document: Dict[str, Any]) -> None:
+        try:
+            self.container.upsert_item(document)
+        except exceptions.CosmosHttpResponseError as e:
+            logger.error(f"Failed to upsert document: {e}")
+        except Exception as e:
+            logger.error(f"Unexpected error during upsert: {str(e)}")
+
+    def log_chat_completion(
+        self,
+        invocation_id: uuid.UUID,
+        client_id: int,
+        wrapper_id: int,
+        request: Dict[str, Any],
+        response: Union[str, ChatCompletion],
+        is_cached: int,
+        cost: float,
+        start_time: str,
+    ) -> None:
+        document = {
+            "type": "chat_completion",
+            "invocation_id": str(invocation_id),
+            "client_id": client_id,
+            "wrapper_id": wrapper_id,
+            "session_id": self.session_id,
+            "request": to_dict(request),
+            "response": to_dict(response),
+            "is_cached": is_cached,
+            "cost": cost,
+            "start_time": start_time,
+            "end_time": get_current_ts(),
+        }
+
+        self.log_queue.put(document)
+
+    def log_event(self, source: Union[str, Agent], name: str, **kwargs: Dict[str, Any]) -> None:
+        document = {
+            "type": "event",
+            "session_id": self.session_id,
+            "event_name": name,
+            "timestamp": get_current_ts(),
+            "details": to_dict(kwargs),
+        }
+
+        if isinstance(source, Agent):
+            document.update(
+                {
+                    "source_id": id(source),
+                    "source_name": source.name if hasattr(source, "name") else str(source),
+                    "source_type": source.__class__.__name__,
+                    "agent_module": source.__module__,
+                }
+            )
+        else:
+            document.update(
+                {
+                    "source_id": id(source),
+                    "source_name": str(source),
+                    "source_type": "System",
+                }
+            )
+
+        self.log_queue.put(document)
+
+    def log_new_agent(self, agent: ConversableAgent, init_args: Dict[str, Any]) -> None:
+        document = {
+            "type": "new_agent",
+            "session_id": self.session_id,
+            "agent_id": id(agent),
+            "agent_name": agent.name,
+            "init_args": to_dict(init_args),
+            "timestamp": get_current_ts(),
+        }
+        self.container.upsert_item(document)
+
+    def log_new_wrapper(self, wrapper: OpenAIWrapper, init_args: Dict[str, Any]) -> None:
+        document = {
+            "type": "new_wrapper",
+            "session_id": self.session_id,
+            "wrapper_id": id(wrapper),
+            "init_args": to_dict(init_args),
+            "timestamp": get_current_ts(),
+        }
+        self.log_queue.put(document)
+
+    def log_new_client(self, client: Any, wrapper: OpenAIWrapper, init_args: Dict[str, Any]) -> None:
+        document = {
+            "type": "new_client",
+            "session_id": self.session_id,
+            "client_id": id(client),
+            "wrapper_id": id(wrapper),
+            "client_class": type(client).__name__,
+            "init_args": to_dict(init_args),
+            "timestamp": get_current_ts(),
+        }
+        self.log_queue.put(document)
+
+    def stop(self) -> None:
+        self.log_queue.put(None)  # Signal to stop the worker thread
+        self.logger_thread.join()  # Wait for the worker thread to finish
+        if self.client:
+            self.client.close()  # Explicitly close the Cosmos client
+
+    def get_connection(self) -> None:
+        # Cosmos DB connection management is handled by the SDK.
+        return None
diff --git a/autogen/logger/logger_factory.py b/autogen/logger/logger_factory.py
index ed9567977bb0..56af9f8838a8 100644
--- a/autogen/logger/logger_factory.py
+++ b/autogen/logger/logger_factory.py
@@ -4,6 +4,13 @@
 from autogen.logger.file_logger import FileLogger
 from autogen.logger.sqlite_logger import SqliteLogger
 
+try:
+    from autogen.logger.cosmos_db_logger import CosmosDBLogger, CosmosDBLoggerConfig
+
+    cosmos_imported = True
+except ImportError:
+    cosmos_imported = False
+
 __all__ = ("LoggerFactory",)
 
 
@@ -19,5 +26,23 @@ def get_logger(
             return SqliteLogger(config)
         elif logger_type == "file":
             return FileLogger(config)
+        elif logger_type == "cosmos":
+            if not cosmos_imported:
+                raise ImportError(
+                    "CosmosDBLogger and CosmosDBLoggerConfig could not be imported. Please ensure the cosmos package is installed by using pip install pyautogen[cosmosdb]."
+                )
+            # Validate configuration for CosmosDBLogger
+            required_keys = {"connection_string", "database_id", "container_id"}
+            if isinstance(config, dict) and required_keys.issubset(config.keys()):
+                cosmos_config: CosmosDBLoggerConfig = {
+                    "connection_string": config["connection_string"],
+                    "database_id": config["database_id"],
+                    "container_id": config["container_id"],
+                }
+                return CosmosDBLogger(cosmos_config)  # Config validated and passed as CosmosDBLoggerConfig
+            else:
+                raise ValueError(
+                    "Provided configuration is missing required keys or is not properly formatted for CosmosDBLogger."
+                )
         else:
             raise ValueError(f"[logger_factory] Unknown logger type: {logger_type}")