She starred on the 1970s sitcom as Dee, the younger sister offering a steady stream of deadpan roasts of her big brother Roger “Raj” Thomas and his friends.

A family spokesperson said Spencer died Monday after battling cancer for several years. As Dee, she was a deadpan, wisecracking sister on What's Happening!! Spencer later became a veterinarian.

Danielle Spencer, who played the precocious youngster Dee Thomas on the 1970s ABC sitcom What’s Happening!!, has died. She was 60. Spencer died Monday in a hospital in Richmond, Virginia, her What’s Happening!! so-star Haywood Nelson told The Hollywood Reporter .