She played Jane Wilson on the NBC soap opera Santa Barbara in 1986-87, being nominated for a Best Newcomer award. She also appeared in one episode of the popular TV-show 21 Jump Street She starred in the 1998 movie Noah (movie) alongside Tony Danza and Wallace Shawn. She appeared in Dan O'Bannon's 1992 film The Resurrected. She co-starred with Mary-Kate and Ashley Olsen in It Takes Two (1995), the telefilm, Au Pair (1999), and was the voice of Joy in the 2006 film remake of Charlotte's Web.

Sibbett has been married to Karl Fink since 18 January 1992. They have three children, a son, Kai and daughters Ruby and Violet. They live in Hawaii, and their children attend Hawaii Preparatory Academy.

Sibbett has been married to Karl Fink since 18 January 1992. They have three children, a son, Kai and daughters Ruby and Violet. They live in Hawaii, and their children attend Hawaii Preparatory Academy.