Most Beautiful 2013

25 Beauties (and Hotties) at 25

From Amanda Seyfried to Armie Hammer, check out Hollywood's hottest crop of stars turning 25 this year

DIANNA AGRON

With her classic good looks, it's no wonder Agron plays queen bee Quinn Fabray on Glee. But the blonde beauty, who turns 25 on April 30, says her own high school experience was much more clueless. "I knew nothing about makeup and hair," she told PEOPLE. "I wore all the wrong colors and plucked my eyebrows too much."