Jennifer Tilly (born September 16, 1958) is a Canadian/American actress and poker player. She is an Academy Award nominee, and a World Series of Poker Ladies' Event bracelet winner. Her sister is Academy Award-nominee, actress Meg Tilly. Formerly married to The Simpsons producer Sam Simon, she is currently dating poker professional Phil Laak.

Tilly gained some additional popularity in recent years for providing voice-over work as killer doll Tiffany for two of the Child's Play movies. In the most recent installment, Seed of Chucky, she plays a dual role, providing the voice for Tiffany and also playing an exaggerated version of herself.

On Family Guy, Tilly voices Bonnie Swanson, the wife of paraplegic policeman Joe Swanson, and mother of Kevin and Susie Swanson. Bonnie was pregnant with Susie since her debut until "Ocean's Three and a Half", a span of 10 real world years.

Her work as Bonnie is the subject of a joke to pay off her gambling debts from her poker playing, as revealed by Bonnie in "The Hand That Rocks the Wheelchair".