The idol turned actor Super Junior's Choi Siwon reportedly lost around 17 pounds for his new drama Oh! My Lady on SBS. He plays the main guy character, Sung Min Woo. The character is a cold and cocky top star, which doesn't really fit Siwon's gentleman personality. Sung Min Woo is also a hottie with a body in the drama so Siwon had to work out an excessive amount to fit in the character's shoes. The ridiculous thing is that Siwon is known for already having an amazing body with a six pack. In just three weeks, he lost 17 pounds. He not only became slimmer but also gained more of a toned body. This is the first time Siwon gets to play the main role so I'm sure he's putting a lot of effort into it. It's been three years since he's acted in a project but he is returning with an anticipated role. The pressure is on but just from this, we can tell that he will do well.