Which movies have you rewatched and were surprised to see an actor that you didn’t know was in it during your first viewing?

I recently rewatched Saving Private Ryan, and had no clue that Bryan Cranston was in it. It really threw me off, because I remember all the other actors, including Vin Diesel’s first big movie debut. It’s not like Cranston wasn’t well known at that time, though I know he was still relatively new to the scene. Anyways, it was pretty cool to see him pop up unexpectedly. Anyone else have an actor show up that you previously didn’t recognize, not forgotten?