Selena Gomez was 16 in Wizards of Waverly Place: The Movie when she played the character 'Alex Russo'.
That was over 15 years ago in 2009.
Today she is 31, and has starred in 49 movies in total, 37 of those since Wizards of Waverly Place: The Movie was released.
In Wizards of Waverly Place: The Movie, I think Selena Gomez looks: