On April 21st, Lee Si Young uploaded a few photos of herself getting ready to film a CF. In the photos, she is dressed in a red dress with high heels, highlighting her slim figure. Along with images, she wrote, "#FilmingCommercial #ThankYou for seeing me a positive light hehe. I can eat after finishing this... #ImGoingToEat #EatEverything #WarmRice #NooroongjiDish #ImHungry!!." Since then, many netizens pointed out how impressed they were at how fast and dedicated the actress must've been to regain her slim figure only after 3 months of giving birth.

Meanwhile, back in January, the actress gave birth to a healthy baby boy after marrying a businessman Jo Seung Hyun last September.

A post shared by 이시영_Lee Si Young (actress) (@leesiyoung38) on Apr 20, 2018 at 7:55pm PDT

#광고촬영 너무 예쁘게 해주셔서 #감사합니다 #히힛

A post shared by 이시영_Lee Si Young (actress) (@leesiyoung38) on Apr 20, 2018 at 7:56pm PDT

#촬영중#이제 이것만 끝나면 난 먹을수 있....#밥먹을꺼야#다먹을꺼야#따뜻한쌀밥 누룽지한정식##배고파‼️‼️‼️

A post shared by 이시영_Lee Si Young (actress)