Julianne Hough was in a high-cut purple bikini yesterday to shoot Rock of Ages in Miami with her costar Diego Boneta. She's made sure to fit regular workouts into her shooting schedule, and she showed off all her hard work in the skimpy two-piece. She and Diego seemed to be having a blast on set, and he tweeted after they wrapped for the day that their stint in the water was a great way to start the awesome adventure of filming. Julianne, meanwhile, wrote about how their director, Adam Shankman, was occupied by clearing the beach of seaweed in order to have the scene look as tidy as possible. There was more Hough family fun in store, since Julianne's sister Marabeth was on hand, too. Lounging in a swimsuit seems to also be one of Julianne's favorite things to do in her downtime. There was more Julianne Hough bikini last week when she hung out by her hotel pool during a day off from the set.