Afterwards, Moon landed her first leading role in It's Okay, Daddy's Girl, playing an immature daughter who transforms into a mature professional woman after a family tragedy.
In 2011, Moon was offered the sole female role in War of the Arrows, an action blockbuster set during the Second Manchu invasion of Korea.
You have to detach your emotions from screen image vs real personalities and lifestyle of celebrities.From influential figures to commoners, no one escapes moral dilemmas. Ratings for The Innocent Man topped its timeslot during its run, and led to Moon winning a Top Excellence Award at the KBS Drama Awards for the second year in a row.Moon played a woman separated from her husband (played by Go Soo) for sixty years by the division of North and South Korea.She was next cast in Brilliant Legacy, one of the top-rated Korean dramas of 2009.
2011 marked Moon's career breakthrough, with leading roles in the television period drama The Princess' Man and the action blockbuster War of the Arrows; both were critical and commercial hits.
In 2012, Moon starred in the Lee Kyung-hee-penned melodrama The Innocent Man opposite Song Joong-ki.
She drew praise for her performance as a cold, cynical woman groomed to take over her father's conglomerate, who later reverts to helpless innocence after losing her memory.
Their onscreen chemistry and the homoerotic subtext of their characters' relationship was received positively, and the couple subsequently received the most votes in the Best Couple poll at the 2008 SBS Drama Awards.
It was the first time in Korean drama history that two actresses won the Best Couple Award, despite the sexual conservatism of Korean network television.
For her performance in the latter, Moon won Best New Actress at the Grand Bell Awards and the Blue Dragon Film Awards.