Ever wonder what happens after you win a reality TV competition like "Project Runway"? Is it just a slow descent into obscurity and depression with a nice pile of parting gifts? Sometimes, sure, but that hasn't been the case for Christian Siriano.

On this week's episode of "Oprah: Where Are They Now" on OWN (Sun. Dec. 22 at 10:00 p.m.), we learn that Siriano, whose eponymous label has become a red carpet favorite and is carried in Neiman Marcus and Saks Fifth Avenue, is doing just fine .In this exclusive clip, see Siriano's airy New York pad, his new dog -- and his boyfriend. 

Are you surprised by Siriano's success, or did you know he'd be a name in fashion after "Project Runway"?