2016–2018: Produce 101 and Produce 48
In January 2016, Sihyeon became a contestant on the survival show Produce 101 as an independent trainee. She was eliminated in episode 8 after ranking 40th place. Following the show's conclusion, she signed with Yue Hua Entertainment.
2019: Debut with EVERGLOW
On February 18, 2019, Yue Hua Entertainment revealed that Sihyeon and fellow Produce 48 contestant Wang Yiren would be debuting in the company's girl group EVERGLOW. That same day, Sihyeon was officially revealed as the group's first member.
EVERGLOW officially debuted on March 18 with the single album "Arrival of EVERGLOW".
2020–2021: The Show
On February 7, 2020, Sihyeon was announced as one of the new hosts for SBS' The Show, alongside Juyeon and Kim Min Kyu. On February 2, 2021, it was announced that all three MCs will be stepping down following the February 2 broadcast of the show.
On December 1, 2020, Yue Hua Entertainment shared that Sihyeon and Yiren had been diagnosed with COVID-19. As a result, all remaining EVERGLOW members and their staff would go on voluntary self-isolation for two weeks. The group had recently recorded an episode of Yoo Hee Yeol's Sketchbook with a few other artists, but they all tested negative.
On January 9, 2021, Yue Hua Entertainment that both Sihyeon and Yiren were out of isolation and tested negative on a final COVID-19 test. Thus, they were cleared to return to group promotions.
- She is known for her strong resemblance to Suzy.
- Prior to Produce 48, she was a trainee for 2 years and 2 months.
- Her hobbies are cooking, collecting pretty things, and nail art.
- Her specialties are singing and dancing.
- Her role models are Sunmi and U-Know.
- Sihyeon's favorite Greek goddess is Demeter.
- Her nicknames include Positivity Queen, Syeon, and Flower Sihyeon.
- Main article: Sihyeon (EVERGLOW)/Gallery