diff --git a/.coverage.LAPTOP-7BUC2HHB.20644.XYqHRFXx b/.coverage.LAPTOP-7BUC2HHB.20644.XYqHRFXx
new file mode 100644
index 000000000..daba3e9ed
Binary files /dev/null and b/.coverage.LAPTOP-7BUC2HHB.20644.XYqHRFXx differ
diff --git a/.gitignore b/.gitignore
index ef6364a9a..cc3ac441c 100644
--- a/.gitignore
+++ b/.gitignore
@@ -28,3 +28,4 @@ archive.zip
 
 # macOS
 .DS_Store
+.python-version
diff --git a/fastapi/_compat.py b/fastapi/_compat.py
index c07e4a3b0..8548109f8 100644
--- a/fastapi/_compat.py
+++ b/fastapi/_compat.py
@@ -92,7 +92,10 @@ if PYDANTIC_V2:
 
         @property
         def alias(self) -> str:
-            a = self.field_info.alias
+            a = (
+                isinstance(self.field_info.validation_alias, str)
+                and self.field_info.validation_alias
+            ) or self.field_info.alias
             return a if a is not None else self.name
 
         @property
@@ -277,7 +280,9 @@ if PYDANTIC_V2:
     def create_body_model(
         *, fields: Sequence[ModelField], model_name: str
     ) -> Type[BaseModel]:
-        field_params = {f.name: (f.field_info.annotation, f.field_info) for f in fields}
+        field_params = {
+            f"{f.alias}": (f.field_info.annotation, f.field_info) for f in fields
+        }
         BodyModel: Type[BaseModel] = create_model(model_name, **field_params)  # type: ignore[call-overload]
         return BodyModel
 
diff --git a/tests/test_alias_and_validation_alias_in_form.py b/tests/test_alias_and_validation_alias_in_form.py
new file mode 100644
index 000000000..2454fe9dd
--- /dev/null
+++ b/tests/test_alias_and_validation_alias_in_form.py
@@ -0,0 +1,58 @@
+"""
+testing to fix incompatibility with alias and validation_alias between fastapi and PYDANTIC_V2
+"""
+
+from fastapi import FastAPI, Form
+from fastapi._compat import PYDANTIC_V2
+from starlette.testclient import TestClient
+
+app: FastAPI = FastAPI()
+
+
+@app.post("/testing_alias")
+async def check_alias(id_test: int = Form(alias="otherId")):
+    return {"other_id": id_test}
+
+
+@app.post("/testing_validation_alias")
+async def check_validation_alias(id_test: int = Form(validation_alias="otherId")):
+    return {"other_id": id_test}
+
+
+client = TestClient(app)
+
+
+def test_get_alias():
+    response = client.post("/testing_alias", data={"otherId": "1"})
+    assert response.status_code == 200
+    assert response.json() == {"other_id": 1}
+
+
+def test_get_validation_alias():
+    if PYDANTIC_V2:
+        data = {"otherId": "1"}
+    else:
+        data = {"id_test": "1"}
+    response = client.post("/testing_validation_alias", data=data)
+    assert response.status_code == 200
+    assert response.json() == {"other_id": 1}
+
+
+def test_file_alias_schema():
+    response = client.get("/openapi.json")
+    assert response.status_code == 200, response.text
+    if PYDANTIC_V2:
+        schema = response.json()
+        assert (
+            "otherId"
+            in schema["components"]["schemas"]["Body_check_alias_testing_alias_post"][
+                "properties"
+            ]
+        )
+
+        assert (
+            "otherId"
+            in schema["components"]["schemas"][
+                "Body_check_validation_alias_testing_validation_alias_post"
+            ]["properties"]
+        )