Movies

For her role in the 1985 film Agnes of God, she won a Golden Globe Award and was nominated for the Academy Award for Best Supporting Actress. Her other film roles include Psycho II (1983), The Big Chill (1983), Masquerade (1988), and Valmont (1989). For her role in the television series Bomb Girls (2012–13), she won the 2013 Canadian Screen Award for Best Lead Actress in a Drama Series.

Tilly has also written multiple novels, including Porcupine (2007), which was a finalist for the Sheila A. Egoff Children's Literature Prize.

Early life
Tilly was born in Long Beach, California to Patricia Ann (née Tilly), a Canadian teacher, and businessman Harry Chan. Her father was Chinese-American, while her mother was of Irish and Finnish descent. She is the younger sister of actress Jennifer Tilly.

Following her parents' divorce when she was three, Tilly was raised by her mother and stepfather, John Ward, on rural Texada Island in British Columbia, Canada. She later claimed that Ward was a violent pedophile. At the age of 12, Tilly started taking dance lessons, in part to avoid her stepfather, and in a few years had developed into a gifted ballerina.

Tilly attended Esquimalt High School in Esquimalt, British Columbia, and also Chief Sealth International High School in Seattle, Washington where she is listed among its alumni. After graduating from high school, Tilly left home and moved to the United States to pursue a career as a professional dancer. In New York City she studied with Madame Darvash and Melissa Hayden on full scholarship. She joined the Connecticut Ballet Company. She made her screen debut (somewhat ironically) as a dancer in Alan Parker's 1980 musical drama Fame, despite the fact that Tilly's dance career had been halted in 1979, when a dance partner dropped her, leading to a serious back injury.