Ethan Gregory Peck is an American actor. He is the grandson of actor Gregory Peck and Greta Kukkonen, Peck's first wife. In 2019, he played a young Spock in Star Trek: Discovery, a role he has reprised for the television series Star Trek: Strange New Worlds. Peck had many television appearances as a young actor, including a younger Michael Kelso (played by Ashton Kutcher) in That '70s Show. In his first film role at age 9, he co-starred in Marshall Law as Jimmy Smits' son.