Yang Se-chan (; born December 8, 1986) is a South Korean comedian and singer.
In April 2017, Yang, along with Jeon So-min, was added as a regular cast member of South Korean variety show Running Man.
In January 2024, Yang signed with new agency Antenna.
He is also famous for the nicknames of Dongdukchon Talai brothers, Gangsu, MC Ssep Ssep, and Yang Ax. His group debut "Uwonye" and "Triple Axel" debuted in 2008 as musical actor. Two years later, he made his debut with the album 'Only One' in 2008 as a singer. His older brother, Yang Se-hyung, is also a comedian who was a cast member for Infinite Challenge until March 31, 2018.