Ha Dong-hoon (Korean: 하동훈; born on August 20, 1979), better known by his stage name Haha (Korean: 하하), is a South Korean singer, variety show host and member of RGP. He is best known for being in the sitcom, Nonstop and for co-hosting two popular variety programs, MBC's Infinite Challenge and SBS's Running Man. He has also hosted his own show, titled "Ya Man TV" on Mnet in 2015.
