Gregory Phillip Grunberg (born July 11, 1966) is an American film and television actor best known for starring as Eric Weiss in the ABC series Alias, Matt Parkman in the NBC series Heroes, Temmin "Snap" Wexley in Star Wars: The Force Awakens and Star Wars: The Rise of Skywalker, and Phil in A Star Is Born. He has often appeared in works produced and directed by his childhood friend J. J. Abrams, such as Felicity as Sean Blumberg. He was a recurring cast member in the first two seasons of the Showtime American television drama series Masters of Sex.

Early life
Grunberg was born in Los Angeles, California, the son of Sandy (née Klein) and Gerry Grunberg and had a Jewish upbringing. He attended University High School in West Los Angeles, class of 1984.