diff --git a/README.md b/README.md
index 179611b5a..1b3848d4f 100644
--- a/README.md
+++ b/README.md
@@ -1486,6 +1486,8 @@ print(response.text)
 
 ## Interactions (Preview)
 
+> **Warning:** The Interactions API is in **Beta**. This is a preview of an experimental feature. Features and schemas are subject to **breaking changes**.
+
 The Interactions API is a unified interface for interacting with Gemini models and agents. It simplifies state management, tool orchestration, and long-running tasks.
 
 See the [documentation site](https://ai.google.dev/gemini-api/docs/interactions) for more details.
diff --git a/google/genai/client.py b/google/genai/client.py
index a1eeaf635..2eb1657c8 100644
--- a/google/genai/client.py
+++ b/google/genai/client.py
@@ -47,7 +47,7 @@
 
 from ._interactions.resources import AsyncInteractionsResource as AsyncNextGenInteractionsResource, InteractionsResource as NextGenInteractionsResource
 from ._interactions.resources import WebhooksResource, AsyncWebhooksResource
-
+_interactions_experimental_warned = False
 
 class AsyncGeminiNextGenAPIClientAdapter(_interactions.AsyncGeminiNextGenAPIClientAdapter):
   """Adapter for the Gemini NextGen API Client."""
@@ -189,6 +189,14 @@ def _nextgen_client(self) -> AsyncGeminiNextGenAPIClient:
 
   @property
   def interactions(self) -> AsyncNextGenInteractionsResource:
+    global _interactions_experimental_warned
+    if not _interactions_experimental_warned:
+      _interactions_experimental_warned = True
+      warnings.warn(
+          'Interactions usage is experimental and may change in future versions.',
+          category=UserWarning,
+          stacklevel=1,
+      )
     return self._nextgen_client.interactions
 
   @property
@@ -546,6 +554,14 @@ def _nextgen_client(self) -> GeminiNextGenAPIClient:
 
   @property
   def interactions(self) -> NextGenInteractionsResource:
+    global _interactions_experimental_warned
+    if not _interactions_experimental_warned:
+      _interactions_experimental_warned = True
+      warnings.warn(
+        'Interactions usage is experimental and may change in future versions.',
+        category=UserWarning,
+        stacklevel=2,
+      )
     return self._nextgen_client.interactions
 
   @property
diff --git a/google/genai/tests/interactions/test_integration.py b/google/genai/tests/interactions/test_integration.py
index c6e94e2f0..13b76f5c0 100644
--- a/google/genai/tests/interactions/test_integration.py
+++ b/google/genai/tests/interactions/test_integration.py
@@ -19,6 +19,21 @@
 pytest_plugins = ("pytest_asyncio",)
 
 
+def test_client_future_warning():
+  with mock.patch.object(
+      client_lib, "_interactions_experimental_warned", new=False
+  ):
+    client = client_lib.Client(
+        api_key="placeholder",
+        http_options={
+            "api_version": "v1alpha",
+        }
+    )
+    with pytest.warns(
+        UserWarning, match="Interactions.*experimental"
+    ):
+      _ = client.interactions
+
 
 def test_client_timeout():
   with mock.patch.object(