I literally can’t remember much else about this movie except this one scene at the end.

So at the end this man/boy who we have thought has been ‘dumb’, ‘stupid’ the whole film because he acts it, stops his whole act and takes off his ‘costume’ then ends up being really good looking and then gets into a red car with a girl and drives off.

I think for most of the movie he was wearing a hat and maybe glasses and like a body warmer. This might be wrong but that might help.

I know this is so brief but I can’t think of the name of this movie for the life of me. Please help.