Lady Gaga was 20 in Voom Portraits when she played the character 'Self'.
That was over 17 years ago in 2007.
This was her first recorded movie acting credit (although may not technically be her first actual acting role).
Today she is 38, and has starred in 70 movies in total, 73 of those since Voom Portraits was released.
In Voom Portraits, I think Lady Gaga looks: