But Yoo is best known as a regular in the films of auteur Hong Sang-soo . He headlined '' The Day He Arrives '' in 2011 , which netted him the Best Actor prize at the Busan Film Critics Awards . He also starred in '' Ha Ha Ha '' , which won the top prize in the Un Certain Regard section of the 2010 Cannes Film Festival , at which Yoo and his fellow cast members walked the red carpet . When asked to describe the actor , Hong said that " Yoo is ... a kind person . " ... I just ... like him . I like him a lot . He is someone with a drive that does n't irritate me . His honesty does n't irritate me either and I like his energy . His energy has a clean color . And I think he 's a lot of help when we work together . " The director cast him opposite renowned French actress Isabelle Huppert in Hong 's first English-language film '' In Another Country '' . He described Huppert as " a real joy " to work with , while she praised him as " kind and charismatic . " Yoo was singled out in '' The Hollywood Reporter '' review as the film 's scene-stealer
2010 Cannes Film Festival
2010 Cannes Film Festival
Yoo Jun-sang