Peter Brett Cullen (born August 26, 1956) is an American actor who has appeared in numerous motion pictures and television programs. Early in 2007, he was cast as the role of an estranged father to one of the American football players, Tim Riggins (played by actor Taylor Kitsch), in the NBC drama series Friday Night Lights.

Cullen was born in Houston, Texas, the son of Lucien Hugh Cullen, an oil industry executive, and Catherine Cullen. He graduated from Madison High School in Houston in 1974. Cullen graduated from the University of Houston, giving great credit to his highly acclaimed acting mentor and University of Houston professor, Cecil Pickett, who also mentored such Houston born actors as Dennis Quaid, Randy Quaid, & Brent Spiner among others. Cullen and Dennis Quaid's close friendship to this day dates back to the 1970s and it is Cullen who introduced Dennis Quaid to his current wife, Kimberly Buffington at a dinner in Austin, Texas.