Logan Lerman was 17 in Percy Jackson & the Olympians: The Lightning Thief when he played the character 'Percy Jackson'.
That was over 13 years ago in 2010.
Today he is 31, and has starred in 27 movies in total, 13 of those since Percy Jackson & the Olympians: The Lightning Thief was released.
In Percy Jackson & the Olympians: The Lightning Thief, I think Logan Lerman looks: