Did she always look old for her age?
The first thing I ever saw her in was NBC's UC: Undercover in fall 2001. I thought the actress was in her mid-30s and was surprised to discover a couple of years later she was actually just 27 when she shot the pilot. She was 3 years younger than her co-star, Jon Seda, who actually looked several years younger than her. Granted, Seda always looked younger than he was, but still.
I recently saw the film Return to Paradise, which I believe was her first movie. That film was released in August 1998, so it would have probably been filmed sometime in mid-late 1997. She would have been 23/24, but she looked like she could have very well been 30.