Emily Osment was 6 in The Secret Life of Girls when she played the character 'Miranda Aiken'.
That was over 25 years ago in 1999.
This was her first recorded movie acting credit (although may not technically be her first actual acting role).
Today she is 32, and has starred in 24 movies in total, 23 of those since The Secret Life of Girls was released.
In The Secret Life of Girls, I think Emily Osment looks: