The first American film to receive an X rating

Starring the likes of Robert De Niro and directed by none other than Brian De Palma, this was the first American film to receive an X rating. Read here.

Motion Picture Ratings - The Free Speech Center

Project X (2012) - IMDb

25 R-Rated Movies That Were Originally NC-17

Captain America: The First Avenger (2011) - IMDb

X-Men (2000) - IMDb

American History X : Movies & TV

The Brief and Scandalous History of the X Rating

This Robert De Niro Comedy Was the First American Film To Be Rated X

American History X : Movies & TV

X-Rated Movies Oscars Winners, Nominations NC-17 Films