Peter Horton (born August 20, 1953) is an American actor and director.
Born in Bellevue, Washington, he is best known for his role as Prof. Gary Shepherd on the popular television series thirtysomething. During that time, in 1991, People Magazine named him one of the "50 Most Beautiful People". He also left that series in 1991 to pursue an interest in directing.
As an actor, Horton appeared in a number of television shows including St. Elsewhere, The White Shadow, Dallas, and Eight Is Enough. He also appeared in the 1997 TV movie version of the Jon Krakauer book Into Thin Air, playing Scott Fischer, the leader of the disastrous 1996 climb on Mount Everest.
As a director, he has worked on a number of television series including thirtysomething, The Wonder Years, Once and Again, and Grey's Anatomy.
Horton was once married to actresses Linda Hamilton (1979-1980) and Michelle Pfeiffer (1981-1988).
