Dan O'Brien: Dan O'Brien. Actor: Grey's Anatomy. Dan O'Brien is an American actor of Irish and Italian descent. He debuted off-off Broadway in 1997 to critical acclaim from Village Voice critic Alexis Soloski, in New Dramatist playwright, Sander Hick's play, 'Sealove, Manager' at the Ohio Theater, Wooster St. New York. After completing his education at the University of Notre Dame, Dan returned to New York and became what theatre critic Martin Denton...
Known For: Grey's Anatomy (Keith Gardner), How I Met Your Mother (Meeker(as Daniel G. O'Brien)), Healing Old Wounds (Dr. Walter Calman), Being Bin Laden (Al-Zawahiri(as Daniel G. O'Brien))