That was over 6 years ago in 2015.
Today she is 18, and has starred in 15 movies in total, 9 since Southpaw was released.
In Southpaw, I think Oona Laurence looks:
Southpaw scores 7.3 out of 10 on The Movie Database.
Oona Laurence's first acting role was as 'Penny Dreadful' in Penny Dreadful, released in 2013 when she was 10.