In 2002 Mun and his Shinhwa bandmates had cameo appearance in the movie Emergency 19 Act.
Another Oh Hae-young team was rewarded a trip to Thailand after the drama ended.
At tv N10 Awards on October 9, Mun was awarded the title of "Ro-co King".
He attended Daechi Elementary School located in Seoul. S, he went to John Burroughs Middle School located in Los Angeles.
Mun spent his years of high school at Parks Junior High School and Sunny Hills High School, both of which are located in Fullerton, California. On March 24, 1998, with the stage name Eric, he debuted as leader and main rapper of group Shinhwa with their single "해결사" (The Solver) on KM Music Tank.
In early 2006, Mun was injured on the set of MBC drama Wolf, resulting in it being pulled off air after four episodes.
Mun was injured whilst shooting a scene, near Namdaemun in Seoul, where he was to save co-star Han Ji-min from being run over by a car.Before his army enlistment, Mun appeared in a period drama for the first time in his acting career with Strongest Chil Woo. He was the first Shinhwa member to enlist for mandatory military service in October 2008.Because of his back injury from the filming of Wolf drama, Mun served non-active duty e.g.Despite its average 7% Nielsen rating, Mun and the team of Discovery of Romance drama received praise for their acting and Eric won a Triple Crown at KBS' 2014 Year End Award (Excellent Actor, Best Couple, and Netizen Award).With this win, Mun had won acting awards at all three major Broadcasting Networks.public service worker after undergoing four weeks of basic training. After being discharged, Mun's first project was supposed to be KBS's action drama Poseidon opposite Kim Ok-bin, set for broadcast in July 2011.