We loved Melissa Joan Hart as Sabrina the Teenage Witch, but she didn’t love her extra weight that piled up over the years. So she partnered with Nutrisystem to take some control over her weight and dropped 40 pounds. She gives props to her husband, Mark Wilkerson, for making exercise fun and something that she didn’t want to stop. The couple spends about one hour, three days a week on weight training and Hart also does cardio and spinning classes. “The best part is that when we work out together, we just want to keep going so sometimes we end up working out for hours at a time,” Hart told E! News.