Leighton Meester [1] is back and looking better than ever. The Gossip Girl alum [2] made her first red carpet appearance since giving birth to her daughter [3], Arlo Day, when she attended the Fox Upfronts presentation in New York City on Monday. Not only did Leighton, who married Adam Brody [4] in 2014 and welcomed Arlo in August 2015, promote her new show [5], Making History, but she also looked amazing as she smiled for the cameras. Looks like the Queen B is back!