"Normally I pass out at the sight of blood being drawn," says Chalke, who starred for several seasons on "Roseanne." "But I was just outside of my Los Angeles apartment when a man who had been changing a tire under his minivan was trapped when the car shifted and fell on him. I was with two female friends, but we couldn't budge it off him, so we ran around and got six more people to help us lift the car and get him out. An ambulance later took him to the hospital."

When Chalke was eight years old, she began appearing in local Vancouver musical theater productions ("until I discovered that I couldn't sing"). A few years later she became a youthful environmental reporter on the Canadian series "Kids' Zone." Chalke then got her big break in 1993, when she was cast as daughter Becky Conner in the hit comedy "Roseanne," replacing actress Lecy Goranson.

Chalke now returns to comedy as she portrays an ambitious, but socially awkward resident who is not afraid to speak her mind. "She's kind of a smarty-pants," says Chalke. "She's sarcastic and fun, competitive and driven, and although she might appear to be just out for herself, you'll learn that she's just nervous about being a good doctor."

In her leisure time Chalke prefers cooking with friends (especially Thai and sushi), playing the guitar, hiking, skiing (she's an instructor), snowboarding, kayaking and reading. In addition she speaks French and German. She also volunteers at a hospice for terminally ill children and works for the Audrey Hepburn Children's Fund. Chalke currently resides in Los Angeles.