Yoo Jun-sang is a South Korean actor and singer. Yoo is best known for starring in the Hong Sang-soo films Ha Ha Ha (2010), The Day He Arrives (2011), and In Another Country (2012). He was also praised for his supporting roles in Wide Awake (2007) and Moss (2010), and gained newfound popularity in 2012 because of the TV drama My Husband Got a Family. Aside from film and television, Yoo is also active in musical theatre, notably in The Three Musketeers, Jack the Ripper and The Days. He is also one of the main characters in The Uncanny Counter seasons 1 and 2

Hahaha (Korean: 하하하) is a 2010 South Korean comedy-drama film written and directed by Hong Sang-soo. It was entered into the 2010 Cannes Film Festival where it won the Prix Un Certain Regard.