Perla Haney-Jardine was 5 in Kill Bill: Vol. 2 when she played the character 'B.B. Kiddo'.
That was over 20 years ago in 2004.
This was her first recorded movie acting credit (although may not technically be her first actual acting role).
Today she is 26, and has starred in 11 movies in total, 10 of those since Kill Bill: Vol. 2 was released.
In Kill Bill: Vol. 2, I think Perla Haney-Jardine looks: