Peter Killian Gallagher is an American actor, musician and writer. Since 1980, Gallagher has played many roles in numerous Hollywood films. He starred as Sandy Cohen in the television drama series The O.C. from 2003 to 2007. He currently appears in a recurring role on the USA Network drama Covert Affairs as CIA Clandestine Services Director Arthur Campbell...(Wikipedia)

Credits include: Bad Santa, Evan Almighty, Cloudy with a Chance of Meatballs, The Pacifier and Sweet November

Credits include: Back to the Future Part III, Elf, Philadelphia, Step Brothers and What's Eating Gilbert Grape

Credits include: Pitch Perfect, Hamlet 2, 21 and Over, Crazy Ex-Girlfriend and Ghosts of War

Credits include: Ready or Not, Infinity Pool, Stockholm, Our House and Pound of Flesh

Credits include: Run Fatboy Run, Kimi, Slumberland, Kevin (Probably) Saves the World and Night Court

Credits include: Don't Breathe, Evil Dead, I Don't Feel at Home in This World Anymore, Castle Rock and Fun Size

Credits include: Another Simple Favor, Zoey's Extraordinary Playlist, Geography Club, Zoey's Extraordinary Christmas and The Glee Project

Credits include: Zoey's Extraordinary Playlist, What/If, Zoey's Extraordinary Christmas, Zoey's Extraordinary Best Friend and Zoey's Extraordinary Boss

Credits include: Loot, Sign, Sign, Everywhere a Sign, Grace, Women Who Rule and Let's Get Physical

Credits include: Zoey's Extraordinary Playlist, Zoey's Extraordinary Christmas, Zoey's Extraordinary Dreams, Zoey's Extraordinary Distraction and Zoey's Extraordinary Boss

Credits include: Zoey's Extraordinary Playlist, Night Court, Zoey's Extraordinary Christmas, Night Court: Pilot and Zoey's Extraordinary Boss