MacFarlane and Clarke dating - UPI.com Producer Seth MacFarlane appears onstage at the 64th Primetime Emmys at the Nokia Theatre in Los Angeles on September 23, 2012. 25 (UPI) -- U.S. actor, writer and producer Seth MacFarlane is dating British actress Emilia Clarke, sources told UsMagazine.com Tuesday. "It's been going on for a few months," an insider said. McFarlane, 38, is best known as the creator of the animated series "The Family Guy." Clarke, 24, is a cast member of the HBO fantasy series "Game of Thrones." Seth "wants someone he is attracted to but who can have a good time and enjoy his success with," the source told UsMagazine.com. He's actually also a 'Game of Thrones' fan!