Topher Grace
Seth MacFarlane
Seth Morrison has: Played Seth Morrison in "The Continuum" in 1996. Played Dean in "Who You Know" in 1998. Performed in "Ski Movie" in 2000. Performed in "Ski Movie 2: High Society" in 2001. Played Ski in "Keep Your Eyes Open" in 2002. Played Seth Morrison in "Ski Movie III: The Front Line" in 2002. Played Seth Morrison in "Lost and Found" in 2007. Played Seth Morrison in "Generations" in 2009. Played Seth Morrison in "Re: Session" in 2009. Played Seth Morrison in "Light the Wick" in 2010. Performed in "The Ordinary Skier" in 2011. Played Seth Morrison in "The Dream Factory" in 2012.
Seth Green played the young Richie Tozier in the movie.
Seth Rogan
ben afleck
Seth Duerr has: Played Death in "The Summoning of Everyman" in 2007. Played Male Worgen in "World of Warcraft: Cataclysm" in 2010. Played Seth in "The Kindergarten Shuffle" in 2010. Played Barabas in "The Jew of Malta" in 2012. Played Victor Armenus in "Dangerous Words from the Fearless" in 2014.
Well to be honest, I have no idea who Leah might be, BUT Seth MIGHT be played by Tyler Posey. It's likely Leah and Seth will be only in the third and forth movie.
Seth Rudetsky has: Played Himself - Coach in "Made" in 2002. Played himself in "Kathy Griffin: My Life on the D-List" in 2005. Played himself in "Legally Blonde the Musical: The Search for Elle Woods" in 2008. Played himself in "Watch What Happens: Live" in 2009. Played Seth in "Varla Jean and the Mushroomheads" in 2011. Played himself in "Smash" in 2012. Played Seth in "Bunheads" in 2012.
Seth Andrew Miller has: Played Weedman in "The 3 Bits" in 2013. Played Charlie in "Sonny" in 2013. Played Pete Withers in "The Shakedowns" in 2013. Played Flaco in "The Shakedowns" in 2013. Played Man in "Audition" in 2014.
Seth McClellan has: Played Greenie in "The Whirlpool" in 2003. Played Ely in "The Looking Glass" in 2003. Played Percy in "Cupids" in 2003. Played Fratboy in "The Hillz" in 2004. Played Shane - Actor in Play in "Hollywood Dreams" in 2006.
Seth Stern has: Played Kyle Jenkins in "The Young and the Restless" in 1973. Played James Boothe in "Passions" in 1999. Played James in "Passions" in 1999. Played Mikey in "Slur" in 2005. Played Young Douglas in "Footsteps" in 2008.
Seth Rogen's received the most acclaim for his 2007 movie "Knocked Up" in which he played a loser who had the harsh reality of getting his life in order after he impregnated a woman in a one night stand.