Model-turned-actress Lee Sung Kyung talked about her weight gain for 'Weightlifting Fairy Kim Bok Joo' during an interview with MBC's 'Section TV' the other day.
She plays a weightlifting athlete in the drama, so she said, "I diligently gained weight. I worked hard to create a healthy image." According to the production crew, she gained 5 kg (~ 11 lbs)!
Regarding her co-star Nam Joo Hyuk, she said, "We were so close. When we were models, we shot a lot of couple pictorials together."