Noh Jung-eui began her career as a child actress through the 2011 action-drama film I Am a Dad. In 2012, she played the young counterparts of Lee Yo-won and Hwang Jung-eum’s respective characters in MBC’s The Horse Healer and SBS Plus’s Full House Take 2. She also portrayed the young versions of Gu Hye-sun and Park Shin-hye’s characters in the 2014 SBS dramas Angel Eyes and Pinocchio, accordingly. In 2016, she became part of the comic-action-noir film Phantom Detective starring Lee Je-hoon. In 2020, she joined the cast of JTBC’s Eighteen Again, which was based on the American film 17 Again. That same year, she starred in the film The Day I Died: Unclosed Case, which earned her a Best New Actress nomination at the 42nd Blue Dragon Film Awards. In 2021, she was cast as one of the main characters in the SBS series Our Beloved Summer, which won her Best New Actress at the SBS Drama Awards.
Noh Jung-eui graduated from Unjung High School and continued her studies at Hanyang University’s theater and film department.