Jeanne Marie Tripplehorn (born June 10, 1963) is an American film and television actress.
Tripplehorn was born in Tulsa, Oklahoma, the daughter of Suzanne (née Ferguson) and Tom Tripplehorn (known as "Tommy Tripplehorn"), who was once a guitarist with Gary Lewis & the Playboys. After graduating from high school, Tripplehorn became a DJ at Tulsa radio station KMOD-FM, using the air name "Jeanie Summers." She was stage-trained as an actress (at Juilliard) and also served as a TV hostess.
Tripplehorn is best-known for her roles starring opposite Michael Douglas in Basic Instinct, Kevin Costner in Waterworld, and Tom Cruise in The Firm. Tripplehorn currently has a leading role as Barbara Henrickson in the HBO drama Big Love.