diff --git a/changelog/3385.deprecated.md b/changelog/3385.deprecated.md
new file mode 100644
index 000000000..e810af08a
--- /dev/null
+++ b/changelog/3385.deprecated.md
@@ -0,0 +1 @@
+- `TranscriptProcessor` and related data classes and frames (`TranscriptionMessage`, `ThoughtTranscriptionMessage`, `TranscriptionUpdateFrame`) are deprecated. Use `LLMUserAggregator`'s and `LLMAssistantAggregator`'s new events (`on_user_turn_stopped` and `on_assistant_turn_stopped`) instead.
diff --git a/src/pipecat/frames/frames.py b/src/pipecat/frames/frames.py
index f2993ea74..fb0f8243b 100644
--- a/src/pipecat/frames/frames.py
+++ b/src/pipecat/frames/frames.py
@@ -536,6 +536,10 @@ class TranscriptionMessage:
         content: The message content/text.
         user_id: Optional identifier for the user.
         timestamp: Optional timestamp when the message was created.
+
+    .. deprecated:: 0.0.99
+        `TranscriptionMessage` is deprecated and will be removed in a future version.
+        Use `LLMUserAggregator`'s and `LLMAssistantAggregator`'s new events instead.
     """
 
     role: Literal["user", "assistant"]
@@ -543,15 +547,44 @@ class TranscriptionMessage:
     user_id: Optional[str] = None
     timestamp: Optional[str] = None
 
+    def __post_init__(self):
+        import warnings
+
+        with warnings.catch_warnings():
+            warnings.simplefilter("always")
+            warnings.warn(
+                "TranscriptionMessage is deprecated and will be removed in a future version. "
+                "Use `LLMUserAggregator`'s and `LLMAssistantAggregator`'s new events instead.",
+                DeprecationWarning,
+                stacklevel=2,
+            )
+
 
 @dataclass
 class ThoughtTranscriptionMessage:
-    """An LLM thought message in a conversation transcript."""
+    """An LLM thought message in a conversation transcript.
+
+    .. deprecated:: 0.0.99
+        `ThoughtTranscriptionMessage` is deprecated and will be removed in a future version.
+        Use `LLMAssistantAggregator`'s new events instead.
+    """
 
     role: Literal["assistant"] = field(default="assistant", init=False)
     content: str
     timestamp: Optional[str] = None
 
+    def __post_init__(self):
+        import warnings
+
+        with warnings.catch_warnings():
+            warnings.simplefilter("always")
+            warnings.warn(
+                "ThoughtTranscriptionMessage is deprecated and will be removed in a future version. "
+                "Use `LLMAssistantAggregator`'s new events instead.",
+                DeprecationWarning,
+                stacklevel=2,
+            )
+
 
 @dataclass
 class TranscriptionUpdateFrame(DataFrame):
@@ -595,10 +628,28 @@ class TranscriptionUpdateFrame(DataFrame):
 
     Parameters:
         messages: List of new transcript messages that were added.
+
+    .. deprecated:: 0.0.99
+        `TranscriptionUpdateFrame` is deprecated and will be removed in a future version.
+        Use `LLMUserAggregator`'s and `LLMAssistantAggregator`'s new events instead.
     """
 
     messages: List[TranscriptionMessage | ThoughtTranscriptionMessage]
 
+    def __post_init__(self):
+        super().__post_init__()
+
+        import warnings
+
+        with warnings.catch_warnings():
+            warnings.simplefilter("always")
+            warnings.warn(
+                "TranscriptionUpdateFrame is deprecated and will be removed in a future version. "
+                "Use `LLMUserAggregator`'s and `LLMAssistantAggregator`'s new events instead.",
+                DeprecationWarning,
+                stacklevel=2,
+            )
+
     def __str__(self):
         pts = format_pts(self.pts)
         return f"{self.name}(pts: {pts}, messages: {len(self.messages)})"
@@ -1160,7 +1211,18 @@ class EmulateUserStartedSpeakingFrame(SystemFrame):
         This frame is deprecated and will be removed in a future version.
     """
 
-    pass
+    def __post_init__(self):
+        super().__post_init__()
+
+        import warnings
+
+        with warnings.catch_warnings():
+            warnings.simplefilter("always")
+            warnings.warn(
+                "EmulateUserStartedSpeakingFrame is deprecated and will be removed in a future version.",
+                DeprecationWarning,
+                stacklevel=2,
+            )
 
 
 @dataclass
@@ -1174,7 +1236,18 @@ class EmulateUserStoppedSpeakingFrame(SystemFrame):
         This frame is deprecated and will be removed in a future version.
     """
 
-    pass
+    def __post_init__(self):
+        super().__post_init__()
+
+        import warnings
+
+        with warnings.catch_warnings():
+            warnings.simplefilter("always")
+            warnings.warn(
+                "EmulateUserStoppedSpeakingFrame is deprecated and will be removed in a future version.",
+                DeprecationWarning,
+                stacklevel=2,
+            )
 
 
 @dataclass
diff --git a/src/pipecat/processors/transcript_processor.py b/src/pipecat/processors/transcript_processor.py
index be59bd9ef..2c9fe2917 100644
--- a/src/pipecat/processors/transcript_processor.py
+++ b/src/pipecat/processors/transcript_processor.py
@@ -269,6 +269,10 @@ class TranscriptProcessor:
         @transcript.event_handler("on_transcript_update")
         async def handle_update(processor, frame):
             print(f"New messages: {frame.messages}")
+
+    .. deprecated:: 0.0.99
+        `TranscriptProcessor` is deprecated and will be removed in a future version.
+        Use `LLMUserAggregator`'s and `LLMAssistantAggregator`'s new events instead.
     """
 
     def __init__(self, *, process_thoughts: bool = False):
@@ -283,6 +287,16 @@ class TranscriptProcessor:
         self._assistant_processor = None
         self._event_handlers = {}
 
+        import warnings
+
+        with warnings.catch_warnings():
+            warnings.simplefilter("always")
+            warnings.warn(
+                "`TranscriptProcessor` is deprecated and will be removed in a future version. "
+                "Use `LLMUserAggregator`'s and `LLMAssistantAggregator`'s new events instead.",
+                DeprecationWarning,
+            )
+
     def user(self, **kwargs) -> UserTranscriptProcessor:
         """Get the user transcript processor.