Happy Birthday, Courteney Cox! The actress-turned-director hits a major milestone today: the star turns 50, and, unsurprisingly, shows no signs of slowing down. Best known for her role as Monica Geller on Friends (can you believe the finale aired a decade ago?) and now as Jules Cobb on Cougar Town, Cox has taken her talents behind the scenes, acting as first-time director of the feature film, Just Before I Go, whose stars include ex-husband David Arquette and daughter, Coco. "I really feel the most beautiful when I'm happy, like now," she tells InStyle.com of her life right now. "I'm in a really good place right now." Cheers!