That was over 5 years ago in 2016.
Today she is 18, and has starred in 15 movies in total, 5 since Pete's Dragon was released.
In Pete's Dragon, I think Oona Laurence looks:
Pete's Dragon scores 6.2 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.