diff --git a/app.py b/app.py
index 284098f..5665cf2 100644
--- a/app.py
+++ b/app.py
@@ -36,6 +36,8 @@ languages = [l.value for l in Languages]
 
 
 def tts_fn(
+    model_name,
+    model_path,
     text,
     language,
     reference_audio_path,
@@ -54,7 +56,7 @@ def tts_fn(
     use_tone,
     speaker,
 ):
-    assert model_holder.current_model is not None
+    model_holder.load_model_gr(model_name, model_path)
 
     wrong_tone_message = ""
     kata_tone: Optional[list[tuple[str, int]]] = None
@@ -418,6 +420,8 @@ if __name__ == "__main__":
         tts_button.click(
             tts_fn,
             inputs=[
+                model_name,
+                model_path,
                 text_input,
                 language,
                 ref_audio_path,
diff --git a/common/tts_model.py b/common/tts_model.py
index 7f44256..c148598 100644
--- a/common/tts_model.py
+++ b/common/tts_model.py
@@ -209,6 +209,18 @@ class ModelHolder:
             raise ValueError(f"Model `{model_name}` is not found")
         if model_path not in self.model_files_dict[model_name]:
             raise ValueError(f"Model file `{model_path}` is not found")
+        if (
+            self.current_model is not None
+            and self.current_model.model_path == model_path
+        ):
+            # Already loaded
+            speakers = list(self.current_model.spk2id.keys())
+            styles = list(self.current_model.style2id.keys())
+            return (
+                gr.Dropdown(choices=styles, value=styles[0]),
+                gr.Button(interactive=True, value="音声合成"),
+                gr.Dropdown(choices=speakers, value=speakers[0]),
+            )
         self.current_model = Model(
             model_path=model_path,
             config_path=os.path.join(self.root_dir, model_name, "config.json"),