Brianna Hildebrand was 21 in Once Upon a Deadpool when she played the character 'Negasonic Teenage Warhead'.
That was over 5 years ago in 2018.
Today she is 27, and has starred in 12 movies in total, 4 of those since Once Upon a Deadpool was released.
In Once Upon a Deadpool, I think Brianna Hildebrand looks: