Kellie Martin got her start in acting when her aunt, a nanny for Michael Landon's children, showed Kellie's picture to Landon. He asked Kellie to audition, she won a guest spot on Landon's Father Murphy (1981), and thus began her acting career.
In February 1987, Martin was a contestant on the game show Card Sharks, hosted by Bob Eubanks, during youth week when she was 11 years old. In introducing herself, she said she wanted to grow up to be a film director. She won $2,600 and almost won a trip to Hawaii, but missed it by one card.
Martin is the national spokeswoman for lupus, since her younger sister, Heather, died of the disease in 1998.