Dagmara Dominczyk was 24 in Rock Star when she played the character 'Tania Asher, Steel Dragon PR'.
That was over 23 years ago in 2001.
This was her first recorded movie acting credit (although may not technically be her first actual acting role).
Today she is 47, and has starred in 28 movies in total, 24 of those since Rock Star was released.
In Rock Star, I think Dagmara Dominczyk looks: