Duetto is a South Korean duo formed by Starship Entertainment in Seoul, South Korea. They released a self-titled EP on May 17, 2017, Duetto and two singles, "Dream" and "Reminisce", in 2018. Baek In-tae and Yoo Seul-gi are classical tenors by training and studied together at Hanyang University under Baritone Go Sung-hyun. Yoo Seul-gi led his class every year, both in college and masters program.
Baek and Yoo were lead members of InGiHyunSang, the 1st runner-up, in the South Korean crossover audition program, JTBC's Phantom Singer.