Bella Ramsey was 14 in Two for Joy when she played the character 'Miranda'.
That was over 5 years ago in 2018.
This was her first recorded movie acting credit (although may not technically be her first actual acting role).
Today she is 20, and has starred in 14 movies in total, 12 of those since Two for Joy was released.
In Two for Joy, I think Bella Ramsey looks: