Movies where everything is a lie

Hi! I wanted some recommendations of movies like The Truman Show and Matrix where the main character just finds out that their reality is not real. Not necessarily movies where the character is being watched (like The Hunger Games), but movies where they didn't know and then found out.

I know that asking for those recommendations is asking for spoilers but in this case i don't mind.

EDIT: Thank you some much everyone!! I never expected this post to get so much attention and answers! I will make sure to watch everything and look back at the discussions! xx