Seth Green (born Seth Benjamin Gesshel-Green; February 8, 1974) is an American actor, comedian, voice actor, television producer, and screenwriter who is best known for creating and voicing various characters on the Adult Swim stop-motion animated comedy series, Robot Chicken, where he is also the writer and director, and for voicing Chris Griffin on the Fox animated sitcom, Family Guy, since 1999. He is also known for his role as Scott Evil in the Austin Powers films and as Daniel "Oz" Osbourne on The WB/UPN television series, Buffy the Vampire Slayer, from 1997 to 2003.
He played Craig White in the 2009 Disney comedy film, Old Dogs, and the motion-capture of Milo in the 2011 Disney animated film, Mars Needs Moms. He also voiced Monty Monogram in the Phineas and Ferb episodes, "Minor Monogram" and "Sipping with the Enemy"
One of his most notable roles during in his teen years was the horror mini-series, It, where he played Young Richie Tozier.