Julianne Hough is dating Ryan Seacrest but Seacrest should be a little worried because Hough was seen hanging out with her Rock of Ages co-star Diego Boneta in a Miami pool. Granted, Julianne Hough’s mother was there to watch over them but you know what they say. First comes swimming together in a pool, then comes the copious amounts of sex in the hotel room. They say that, right? Because that’s what I’ve been telling the girls swimming at my gym.