Olivia Marsh, the sister of NewJeans' Danielle Marsh, will make her official debut with a single titled "42," her agency MPLIFY said Wednesday.

A teaser video was uploaded on Wednesday showing Olivia Marsh spending her birthday as a child with her family, and a short peek into the upcoming song.


The singer will perform at the SXSW Sydney music festival on Oct. 16 from 9:30 p.m. to 10 p.m.

Olivia Marsh is the first artist to debut under MPLIFY, a Korean music label founded by the Korean branch of Warner Music. She released a song titled "Lava" earlier this year as a part of the soundtrack album for JTBC drama series "Hide."

Olivia Marsh is the older sister of Danielle Marsh, the 19-year-old member of K-pop girl group NewJeans.

BY YOON SO-YEON [yoon.soyeon@joongang.co.kr]