SEE ALSO: Lee Si Young bares her true self in raw, emotional Paris vlog

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 ???_Lee Si Young (actress) (@leesiyoung38) on Apr 20, 2018 at 7:55pm PDT

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

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A post shared by ???_Lee Si Young (actress)