Most Beautiful 2014

25 Beauties (and Hotties) at 25

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

PENN BADGLEY

The actor literally flexed his muscles on the big screen in 2009's The Stepfather, but it's his signature quick-wit that makes the Gossip Girl stud stand out. "He has a humble, comedic air that is disarming and looks effortless – in life, at work, and in public," costar and current onscreen love interest Leighton Meester told InStyle.