2018–2021: Produce 48 and Iz*One From June 15 to August 31, 2018, An represented
Starship Entertainment alongside
Jang Won-young and Cho Ka-hyeon on reality girl group survival show
Produce 48. An placed fifth and debuted with Iz*One. The group's debut
extended play (EP)
Color*Iz was released on October 29, 2018, with "
La Vie en Rose" serving as its lead single. Several months after her debut with Iz*One, An participated in the televised singing competition
King of Mask Singer. She was the youngest competitor in the show's history, aged 15 years and 99 days. It was announced that An would become a cast member in
MBC's
My Little Television V2, alongside
Kim Gu-ra. However, she was removed from the cast starting from episode 34 due to the
Mnet vote manipulation investigation. From March 2021 to March 2022, An hosted the music program
Inkigayo alongside
NCT's
Sungchan and
Treasure's Jihoon.
2021–present: Ive and solo activities After Iz*One disbanded in April 2021, she and groupmate
Wonyoung returned to Starship Entertainment as trainees. On November 1, 2021, Starship Entertainment announced they would debut their new girl group
Ive. It was the label's first group since the debut of
Cravity in April 2020 and their first girl group since
WJSN's debut in February 2016. An was later revealed as the leader and one of the vocalists of Ive. They made their official debut with the single album,
Eleven on December 1, 2021
. In 2022, An served as a panelist on season two of the "military survival"
reality show Steel Troops. Two days later, An released the music video for their
promotional single, titled "Move Like This" along with
Kang Daniel and
Yuna Kim, as part of the
Gatorade and Starship Entertainment campaign. On December 24, An hosted the year-end
SBS Gayo Daejeon festival with
Key and
Cha Eun-woo held at the
Gocheok Sky Dome. In January 2023, it was confirmed that An would be returning for the second season of
Earth Arcade. In September, An attended the
Milan Fashion Week as an ambassador for fashion brand Fendi. An was chosen to host the
SBS Gayo Daejeon, which will be held on December 25, 2023. This marked her second consecutive year hosting the event. In February 2024, An was cast in the
TVING variety show
Crime Scene Returns. On April 8, 2024, it was announced that An had been nominated for two awards at the
60th Baeksang Arts Awards,
Best Female Variety Performer and the
Prizm Popularity Award (Female), of which she won the latter. In May 2024, it was announced that she would be returning for the
Earth Arcade spin-off, ''Earth Arcade's Vroom Vroom
. On June 25, 2024, it was announced that An would be hosting the SBS Gayo Daejeon'' for the third consecutive year. In January 2025, it was announced that An would be returning in a new season of
Crime Scene, titled
Crime Scene Zero, streaming on
Netflix. She was confirmed to be returning in the third season of
Earth Arcade in April 2025. ==Other ventures==