Sean Patrick Astin (born Sean Patrick Duke in Santa Monica, California on February 25, 1971; age 53) is the voice of Raphael in the 2012 TV series by Nickelodeon. Astin is well known for several roles: Samwise Gamgee in The Lord of the Rings trilogy, Mikey Walsh, the adventurous leader, in The Goonies, Daniel "Rudy" Ruettiger in Rudy, William "Billy" Temper in Toy Soldiers, and Bob Newby in the second season of Stranger Things.
He is the second Goonies cast member to play one of the Turtles, the first being Corey Feldman as Donatello in the first and third 90s movies and Slash in the 2012 series. He is best known as the voice of Special Agent Oso from the television series of the same name.