diff --git a/vertexai/_genai/types/__init__.py b/vertexai/_genai/types/__init__.py
index 8b02bc222c..ea91adbc4b 100644
--- a/vertexai/_genai/types/__init__.py
+++ b/vertexai/_genai/types/__init__.py
@@ -1042,6 +1042,12 @@
 from .common import UpdateMultimodalDatasetConfig
 from .common import UpdateMultimodalDatasetConfigDict
 from .common import UpdateMultimodalDatasetConfigOrDict
+from .common import UserScenario
+from .common import UserScenarioDict
+from .common import UserScenarioOrDict
+from .common import UserSimulatorConfig
+from .common import UserSimulatorConfigDict
+from .common import UserSimulatorConfigOrDict
 from .common import VertexBaseConfig
 from .common import VertexBaseConfigDict
 from .common import VertexBaseConfigOrDict
@@ -1059,6 +1065,9 @@
     "PromptTemplateData",
     "PromptTemplateDataDict",
     "PromptTemplateDataOrDict",
+    "UserScenario",
+    "UserScenarioDict",
+    "UserScenarioOrDict",
     "EvaluationPrompt",
     "EvaluationPromptDict",
     "EvaluationPromptOrDict",
@@ -1155,6 +1164,9 @@
     "EvaluationRunAgentConfig",
     "EvaluationRunAgentConfigDict",
     "EvaluationRunAgentConfigOrDict",
+    "UserSimulatorConfig",
+    "UserSimulatorConfigDict",
+    "UserSimulatorConfigOrDict",
     "EvaluationRunInferenceConfig",
     "EvaluationRunInferenceConfigDict",
     "EvaluationRunInferenceConfigOrDict",
diff --git a/vertexai/_genai/types/common.py b/vertexai/_genai/types/common.py
index 2ec662eded..5c2553f94d 100644
--- a/vertexai/_genai/types/common.py
+++ b/vertexai/_genai/types/common.py
@@ -490,6 +490,32 @@ class PromptTemplateDataDict(TypedDict, total=False):
 PromptTemplateDataOrDict = Union[PromptTemplateData, PromptTemplateDataDict]
 
 
+class UserScenario(_common.BaseModel):
+    """User scenario to help simulate multi-turn agent running results."""
+
+    starting_prompt: Optional[str] = Field(
+        default=None,
+        description="""The prompt that starts the conversation between the simulated user and the agent under test.""",
+    )
+    conversation_plan: Optional[str] = Field(
+        default=None,
+        description="""The plan for the conversation, used to drive the multi-turn agent run and generate the simulated agent evaluation dataset.""",
+    )
+
+
+class UserScenarioDict(TypedDict, total=False):
+    """User scenario to help simulate multi-turn agent running results."""
+
+    starting_prompt: Optional[str]
+    """The prompt that starts the conversation between the simulated user and the agent under test."""
+
+    conversation_plan: Optional[str]
+    """The plan for the conversation, used to drive the multi-turn agent run and generate the simulated agent evaluation dataset."""
+
+
+UserScenarioOrDict = Union[UserScenario, UserScenarioDict]
+
+
 class EvaluationPrompt(_common.BaseModel):
     """Represents the prompt to be evaluated."""
 
@@ -501,6 +527,10 @@ class EvaluationPrompt(_common.BaseModel):
     prompt_template_data: Optional[PromptTemplateData] = Field(
         default=None, description="""Prompt template data."""
     )
+    user_scenario: Optional[UserScenario] = Field(
+        default=None,
+        description="""User scenario to help simulate multi-turn agent running results.""",
+    )
 
 
 class EvaluationPromptDict(TypedDict, total=False):
@@ -515,6 +545,9 @@ class EvaluationPromptDict(TypedDict, total=False):
     prompt_template_data: Optional[PromptTemplateDataDict]
     """Prompt template data."""
 
+    user_scenario: Optional[UserScenarioDict]
+    """User scenario to help simulate multi-turn agent running results."""
+
 
 EvaluationPromptOrDict = Union[EvaluationPrompt, EvaluationPromptDict]
 
@@ -1830,6 +1863,38 @@ class EvaluationRunAgentConfigDict(TypedDict, total=False):
 ]
 
 
+class UserSimulatorConfig(_common.BaseModel):
+    """Configuration for a user simulator that uses an LLM to generate messages."""
+
+    model_name: Optional[str] = Field(
+        default=None,
+        description="""The model name to use for multi-turn agent scraping.""",
+    )
+    model_configuration: Optional[genai_types.GenerateContentConfig] = Field(
+        default=None, description="""The configuration for the model."""
+    )
+    max_turn: Optional[int] = Field(
+        default=None,
+        description="""Maximum number of invocations allowed. Stops run-off conversations.""",
+    )
+
+
+class UserSimulatorConfigDict(TypedDict, total=False):
+    """Configuration for a user simulator that uses an LLM to generate messages."""
+
+    model_name: Optional[str]
+    """The model name to use for multi-turn agent scraping."""
+
+    model_configuration: Optional[genai_types.GenerateContentConfigDict]
+    """The configuration for the model."""
+
+    max_turn: Optional[int]
+    """Maximum number of invocations allowed. Stops run-off conversations."""
+
+
+UserSimulatorConfigOrDict = Union[UserSimulatorConfig, UserSimulatorConfigDict]
+
+
 class EvaluationRunInferenceConfig(_common.BaseModel):
     """This field is experimental and may change in future versions.
 
@@ -1843,6 +1908,10 @@ class EvaluationRunInferenceConfig(_common.BaseModel):
         default=None,
         description="""The fully qualified name of the publisher model or endpoint to use for inference.""",
     )
+    user_simulator_config: Optional[UserSimulatorConfig] = Field(
+        default=None,
+        description="""Configuration for user simulation in multi-turn agent scraping. If provided, and the dataset contains conversation plans, user simulation will be triggered.""",
+    )
 
 
 class EvaluationRunInferenceConfigDict(TypedDict, total=False):
@@ -1857,6 +1926,9 @@ class EvaluationRunInferenceConfigDict(TypedDict, total=False):
     model: Optional[str]
     """The fully qualified name of the publisher model or endpoint to use for inference."""
 
+    user_simulator_config: Optional[UserSimulatorConfigDict]
+    """Configuration for user simulation in multi-turn agent scraping. If provided, and the dataset contains conversation plans, user simulation will be triggered."""
+
 
 EvaluationRunInferenceConfigOrDict = Union[
     EvaluationRunInferenceConfig, EvaluationRunInferenceConfigDict
@@ -13546,6 +13618,11 @@ class EvalRunInferenceConfig(_common.BaseModel):
     generate_content_config: Optional[genai_types.GenerateContentConfig] = Field(
         default=None, description="""The config for the generate content call."""
     )
+    user_simulator_config: Optional[UserSimulatorConfig] = Field(
+        default=None,
+        description="""Configuration for user simulation in multi-turn agent scraping. If provided, and the dataset contains
+      conversation plans, user simulation will be triggered.""",
+    )
 
 
 class EvalRunInferenceConfigDict(TypedDict, total=False):
@@ -13560,6 +13637,10 @@ class EvalRunInferenceConfigDict(TypedDict, total=False):
     generate_content_config: Optional[genai_types.GenerateContentConfigDict]
     """The config for the generate content call."""
 
+    user_simulator_config: Optional[UserSimulatorConfigDict]
+    """Configuration for user simulation in multi-turn agent scraping. If provided, and the dataset contains
+      conversation plans, user simulation will be triggered."""
+
 
 EvalRunInferenceConfigOrDict = Union[EvalRunInferenceConfig, EvalRunInferenceConfigDict]