We've had actors-turned-mayors, and actors-turned-governors. . . but actors-turned-White House staffers? That's a new one! "House" star Kal Penn -- whose character was killed off on Monday's episode -- is taking a sabbatical from acting to work for President Obama. The 31-year-old actor, first launched to fame as a stoner student in the "Harold and Kumar" movies, is coming to Washington to be associate director in the White House Office of Public Liaison, Entertainment Weekly first reported yesterday.