Length of engagement: 1 year, 6 months Teigen and Legend took the next step to marriage in late 2011 and plan to walk down the aisle in the fall. "I'm excited," the model told PEOPLE. "I can't wait for the ceremony. I just want to finally see all of my friends in one area." With a Vera Wang dress secured and a reception performance by the singer planned, it's just a matter of tying up details – on the down-low. As Teigen said, "We don't mean to be tight-lipped, but we have to save something."