diff --git a/fastapi/param_functions.py b/fastapi/param_functions.py
index 844542594..0834fd741 100644
--- a/fastapi/param_functions.py
+++ b/fastapi/param_functions.py
@@ -5,6 +5,7 @@ from annotated_doc import Doc
 from fastapi import params
 from fastapi._compat import Undefined
 from fastapi.openapi.models import Example
+from pydantic import AliasChoices, AliasPath
 from typing_extensions import Literal, deprecated
 
 _Unset: Any = Undefined
@@ -54,10 +55,8 @@ def Path(  # noqa: N802
             """
         ),
     ] = _Unset,
-    # TODO: update when deprecating Pydantic v1, import these types
-    # validation_alias: str | AliasPath | AliasChoices | None
     validation_alias: Annotated[
-        Union[str, None],
+        Union[str, AliasPath, AliasChoices, None],
         Doc(
             """
             'Whitelist' validation step. The parameter field will be the single one
@@ -379,10 +378,8 @@ def Query(  # noqa: N802
             """
         ),
     ] = _Unset,
-    # TODO: update when deprecating Pydantic v1, import these types
-    # validation_alias: str | AliasPath | AliasChoices | None
     validation_alias: Annotated[
-        Union[str, None],
+        Union[str, AliasPath, AliasChoices, None],
         Doc(
             """
             'Whitelist' validation step. The parameter field will be the single one
@@ -683,10 +680,8 @@ def Header(  # noqa: N802
             """
         ),
     ] = _Unset,
-    # TODO: update when deprecating Pydantic v1, import these types
-    # validation_alias: str | AliasPath | AliasChoices | None
     validation_alias: Annotated[
-        Union[str, None],
+        Union[str, AliasPath, AliasChoices, None],
         Doc(
             """
             'Whitelist' validation step. The parameter field will be the single one
@@ -999,10 +994,8 @@ def Cookie(  # noqa: N802
             """
         ),
     ] = _Unset,
-    # TODO: update when deprecating Pydantic v1, import these types
-    # validation_alias: str | AliasPath | AliasChoices | None
     validation_alias: Annotated[
-        Union[str, None],
+        Union[str, AliasPath, AliasChoices, None],
         Doc(
             """
             'Whitelist' validation step. The parameter field will be the single one
@@ -1326,10 +1319,8 @@ def Body(  # noqa: N802
             """
         ),
     ] = _Unset,
-    # TODO: update when deprecating Pydantic v1, import these types
-    # validation_alias: str | AliasPath | AliasChoices | None
     validation_alias: Annotated[
-        Union[str, None],
+        Union[str, AliasPath, AliasChoices, None],
         Doc(
             """
             'Whitelist' validation step. The parameter field will be the single one
@@ -1641,10 +1632,8 @@ def Form(  # noqa: N802
             """
         ),
     ] = _Unset,
-    # TODO: update when deprecating Pydantic v1, import these types
-    # validation_alias: str | AliasPath | AliasChoices | None
     validation_alias: Annotated[
-        Union[str, None],
+        Union[str, AliasPath, AliasChoices, None],
         Doc(
             """
             'Whitelist' validation step. The parameter field will be the single one
@@ -1955,10 +1944,8 @@ def File(  # noqa: N802
             """
         ),
     ] = _Unset,
-    # TODO: update when deprecating Pydantic v1, import these types
-    # validation_alias: str | AliasPath | AliasChoices | None
     validation_alias: Annotated[
-        Union[str, None],
+        Union[str, AliasPath, AliasChoices, None],
         Doc(
             """
             'Whitelist' validation step. The parameter field will be the single one
diff --git a/fastapi/params.py b/fastapi/params.py
index cc2934f44..72e797f83 100644
--- a/fastapi/params.py
+++ b/fastapi/params.py
@@ -6,6 +6,7 @@ from typing import Annotated, Any, Callable, Optional, Union
 
 from fastapi.exceptions import FastAPIDeprecationWarning
 from fastapi.openapi.models import Example
+from pydantic import AliasChoices, AliasPath
 from pydantic.fields import FieldInfo
 from typing_extensions import Literal, deprecated
 
@@ -34,9 +35,7 @@ class Param(FieldInfo):  # type: ignore[misc]
         annotation: Optional[Any] = None,
         alias: Optional[str] = None,
         alias_priority: Union[int, None] = _Unset,
-        # TODO: update when deprecating Pydantic v1, import these types
-        # validation_alias: str | AliasPath | AliasChoices | None
-        validation_alias: Union[str, None] = None,
+        validation_alias: Union[str, AliasPath, AliasChoices, None] = None,
         serialization_alias: Union[str, None] = None,
         title: Optional[str] = None,
         description: Optional[str] = None,
@@ -147,9 +146,7 @@ class Path(Param):  # type: ignore[misc]
         annotation: Optional[Any] = None,
         alias: Optional[str] = None,
         alias_priority: Union[int, None] = _Unset,
-        # TODO: update when deprecating Pydantic v1, import these types
-        # validation_alias: str | AliasPath | AliasChoices | None
-        validation_alias: Union[str, None] = None,
+        validation_alias: Union[str, AliasPath, AliasChoices, None] = None,
         serialization_alias: Union[str, None] = None,
         title: Optional[str] = None,
         description: Optional[str] = None,
@@ -233,9 +230,7 @@ class Query(Param):  # type: ignore[misc]
         annotation: Optional[Any] = None,
         alias: Optional[str] = None,
         alias_priority: Union[int, None] = _Unset,
-        # TODO: update when deprecating Pydantic v1, import these types
-        # validation_alias: str | AliasPath | AliasChoices | None
-        validation_alias: Union[str, None] = None,
+        validation_alias: Union[str, AliasPath, AliasChoices, None] = None,
         serialization_alias: Union[str, None] = None,
         title: Optional[str] = None,
         description: Optional[str] = None,
@@ -317,9 +312,7 @@ class Header(Param):  # type: ignore[misc]
         annotation: Optional[Any] = None,
         alias: Optional[str] = None,
         alias_priority: Union[int, None] = _Unset,
-        # TODO: update when deprecating Pydantic v1, import these types
-        # validation_alias: str | AliasPath | AliasChoices | None
-        validation_alias: Union[str, None] = None,
+        validation_alias: Union[str, AliasPath, AliasChoices, None] = None,
         serialization_alias: Union[str, None] = None,
         convert_underscores: bool = True,
         title: Optional[str] = None,
@@ -403,9 +396,7 @@ class Cookie(Param):  # type: ignore[misc]
         annotation: Optional[Any] = None,
         alias: Optional[str] = None,
         alias_priority: Union[int, None] = _Unset,
-        # TODO: update when deprecating Pydantic v1, import these types
-        # validation_alias: str | AliasPath | AliasChoices | None
-        validation_alias: Union[str, None] = None,
+        validation_alias: Union[str, AliasPath, AliasChoices, None] = None,
         serialization_alias: Union[str, None] = None,
         title: Optional[str] = None,
         description: Optional[str] = None,
@@ -487,9 +478,7 @@ class Body(FieldInfo):  # type: ignore[misc]
         media_type: str = "application/json",
         alias: Optional[str] = None,
         alias_priority: Union[int, None] = _Unset,
-        # TODO: update when deprecating Pydantic v1, import these types
-        # validation_alias: str | AliasPath | AliasChoices | None
-        validation_alias: Union[str, None] = None,
+        validation_alias: Union[str, AliasPath, AliasChoices, None] = None,
         serialization_alias: Union[str, None] = None,
         title: Optional[str] = None,
         description: Optional[str] = None,
@@ -600,9 +589,7 @@ class Form(Body):  # type: ignore[misc]
         media_type: str = "application/x-www-form-urlencoded",
         alias: Optional[str] = None,
         alias_priority: Union[int, None] = _Unset,
-        # TODO: update when deprecating Pydantic v1, import these types
-        # validation_alias: str | AliasPath | AliasChoices | None
-        validation_alias: Union[str, None] = None,
+        validation_alias: Union[str, AliasPath, AliasChoices, None] = None,
         serialization_alias: Union[str, None] = None,
         title: Optional[str] = None,
         description: Optional[str] = None,
@@ -684,9 +671,7 @@ class File(Form):  # type: ignore[misc]
         media_type: str = "multipart/form-data",
         alias: Optional[str] = None,
         alias_priority: Union[int, None] = _Unset,
-        # TODO: update when deprecating Pydantic v1, import these types
-        # validation_alias: str | AliasPath | AliasChoices | None
-        validation_alias: Union[str, None] = None,
+        validation_alias: Union[str, AliasPath, AliasChoices, None] = None,
         serialization_alias: Union[str, None] = None,
         title: Optional[str] = None,
         description: Optional[str] = None,