Jennifer Leigh Warren is an American stage, television, film, and voice-over actress/singer who first came to the world's attention for her work in professional musical theater. She is best known for originating the role of Crystal in the Howard Ashman /Alan Menken hit musical Little Shop of Horrors, for her performance in the original Broadway cast of the Michael John LaChiusa musical Marie Christine and for her show stopping performance of “Alice’s Daughter” in the original Broadway musical "Big River" with the song "How Blest We Are" written especially for her by Roger Miller.

She is a NAACP Theatre Award nominee, Los Angeles Times Ovation Award winner (and three-time nominee), Backstage Garland award winner, and won two Broadway World awards in the same season for her portrayal of the fairy godmother in the first US pantomime production A Cinderella Christmas directed by Bonnie Lythgoe and for her one-woman concert event Diamonds Are Forever:The Songs of Dame Shirley Bassey, that premiered in Los Angeles at the Renberg Theater, directed by Richard Jay-Alexander.