Yeonwoo debuted with the South Korean girl group Momoland in November 2016 with the extended play Welcome to Momoland. In January 2018, the group released their third extended play Great! with Bboom Bboom as its lead single. The hit song earned a platinum certification on the Gaon Music Chart, making Momoland the first South Korean girl group to achieve the feat. In late 2019, it was confirmed that Yeonwoo left the band to concentrate on acting.
Yeonwoo made her official acting debut with a supporting role in the 2019 tvN series Pegasus Market. In 2020, she played Kim Hee-sun’s younger sister in the SBS sci-fi drama Alice. That same year, she became part of the main cast of the eight-episode JTBC teen series Live On. This was followed by another main role in the 2020 KBS2 drama Cheat on Me, If You Can.
Yeonwoo has an older sister. She attended the School of Performing Arts Seoul.