By Danielle Emig
Updated Oct 24, 2014 @ 7:14 am
Credit: Frazer Harrison/Getty Images

Happy birthday, Zac Posen! The New York fashion designer turns 34 today, and already has so much to celebrate. He launched his namesake label at the age of 21, presented his first show in 2002, and he won the CFDA's Perry Ellis Award for Ready-to-Wear in 2004. Posen quickly gained attention and a celebrity following, including Naomi Watts, Claire Danes, Reese Witherspoon, and close friend model Coco Rocha (they met during his spring 2007 show).

In 2010, he was one of the earlier designers to collaborate with Target and in 2012 he joined Project Runway as a judge, replacing Michael Kors. Most recently he has partnered with David's Bridal on Truly Zac Posen, his first bridal collection (though he did design Rocha's dress for her 2010 wedding!)

In honor of the designer's birthday, we're taking a look back at best dressed celebrities wearing Zac Posen.