Mckenna Grace was 5 in R when she played the character 'Riley (Young)'.
That was over 11 years ago in 2013.
This was her first recorded movie acting credit (although may not technically be her first actual acting role).
Today she is 17, and has starred in 27 movies in total, 24 of those since R was released.
In R, I think Mckenna Grace looks: