Seth Green is an American actor, comedian, producer, writer, and director, known for co-creating Adult Swim's stop-motion series, Robot Chicken, also serving as executive producer, writer, and director, as well as supplying his voice. He is also known for his starring roles on Buffy the Vampire Slayer as Daniel "Oz" Osbourne (alongside Sarah Michelle Gellar), Family Guy as Chris Griffin (with Seth MacFarlane and former co-star, Lacey Chabert), Leonardo on Nickelodeon's Teenage Mutant Ninja Turtles (co-starring Rob Paulsen, Sean Astin, Greg Cipes and Kevin Michael Richardson) and Loki Loud in The Loud House. He also starred in the film Without a Paddle (alongside Matthew Lillard).