Kristen Johnston (born September 20, 1967) is an American stage, film, and television actress. She is most famous for her role as Sally Solomon in the television series 3rd Rock from the Sun. She also starred as Wilma Flintstone in The Flintstones in Viva Rock Vegas and as Holly Franklin in the sitcom The Exes. She voiced Sylvia (in deleted scenes) in Ice Age. Johnston made her professional stage debut with New York's Atlantic Theater Company, which was founded by playwright David Mamet. During her association with that company, she appeared in such productions as As You Like It, Girl's Talk, Stage Door, Author's Voice, Portrait of a Woman, and Rosemary for Remembrance.