Jennifer Tilly, born Jennifer Ellen Chan; September 16, 1958,  is an American and Canadian actress and professional poker player. Known for her distinctive breathy voice and comedic timing, she is the recipient of a Saturn Award and a GLAAD Award, as well as nominations for an Academy Award and two MTV Movie Awards.

Following a succession of small parts in film and on television throughout the mid-late 1980s, Tilly made her feature film breakthrough with a supporting role as Olive Neal in Bullets Over Broadway (1994), for which she was nominated for the Oscar for Best Supporting Actress. She subsequently earned acclaim for her portrayal of Violet, a lesbian femme fatale, in Bound (1996). Tilly rose to widespread recognition when she played Tiffany Valentine in Bride of Chucky (1998), reprising the character in several more installments of the Child's Play film series, as well as the Syfy/USA show Chucky (2021–2024). Her association with the franchise has established her as a pop culture icon and scream queen. Since 1999, Tilly has voiced Bonnie Swanson on the Fox animated sitcom Family Guy.

Tilly's other film credits include The Fabulous Baker Boys (1989), Made in America (1993), Liar Liar (1997), Music from Another Room (1998), Stuart Little (1999), The Cat's Meow (2001), Monsters, Inc. (2001), The Haunted Mansion (2003), Home on the Range (2004), and Tideland (2005). On stage, she appeared in the Broadway revivals of The Women (2001) and Don't Dress for Dinner (2012), and was the recipient of a Theatre World Award in 1993 for her performance in the off-Broadway play One Shoe Off.

Tilly is a World Series of Poker bracelet champion, becoming the first-ever celebrity to win such a tournament in 2005. She won the third World Poker Tour Ladies Invitational Tournament that same year, and was nominated for PokerListings' Spirit of Poker Living Legend Award in 2014. As of 2019, her live tournament winnings exceeded $1 million.