Actor: Seann William Scott
Films: American Pie (1999), American Pie 2 (2001), American Pie: The Wedding (2003), American Pie: Reunion (2012)
Steve Stifler is a lewd young man who doesn't change in later age. He is known to be into sport, namely lacrosse, but isn't particularly academic and it makes him suffer in later life.
Despite this, he is very popular at school thanks to his ability to throw a damn good party and, equally, because he has a very attractive mother who looks a lot like Jennifer Coolidge. Some might even call her a MILF.
He is clearly a ladies man, at least in his own mind, but cares deeply for his friends too. That is, except for Paul Finch who Stifler fears may one day be his father-in-law... or at least the father of his half-sibling. He may also have a fear of chocolate cake.
Seann William Scott's big break came in the American Pie franchise as party-thrower Stifler. As a result of this role he has come to be typecast in that role.
Despite this, Scott has had a varied career outside the American Pie franchise. Sure, he played a similar part in Road Trip (2000), Dude Where's My Car (2000) and Role Models (2008), but he has also been a monk's assistant in Bulletproof Monk (2003) and done some voice acting in the form of Crash in the Ice Age sequels.
Finally, Seann William Scott's most famous role outside of American Pie came in the form of Bo in The Dukes of Hazard (2005) - a reboot of the famous TV series.