NEW YORK – SEPTEMBER 18: Leighton Meester, Penn Badgley, Blake Lively, Taylor Momsen, Chace Crawford and Ed Westwick arrive at “Gossip Girl” premiere party at TenJune on September 18, 2007 in New York City. (Photo by Larry Busacca/WireImage)

On this day in 2008, the world met Serena, Blair, Chuck, Dan and of course xoxo Gossip Girl!

Penn Badgley recently had Taylor Momsen on his podcast to reflect on their time on the show.