Her father, who majored in physics, and her mother, who studied music (piano), met as international students in Germany and got married.

[5] Upon returning to South Korea in 2005, Moon's uncle and mother submitted photos of her and her older sister for a modeling contest just for fun.

She slowly made notable appearances on big screen, lending her voice to Black House (2007) and taking on minor roles in Shadows in the Palace (2007), Our Town (2007), and Do You See Seoul?

However, during middle school, she experienced a significant growth spurt of over 10 centimeters and took a break from acting, both willingly and partially, because she became too tall for child roles.

[13] Additionally, Moon was chosen to play the character Oh-reum, a ghost with a captivating backstory, in tvN's new Monday-Tuesday drama titled Who Are You?

[8] In April 2015, Moon portrayed the female protagonist in the web drama Exo Next Door, which aired on Naver TV Cast.

With her focus on academics and a rebellious spirit, Ppal-gang builds a barrier against the cold-hearted adults who have caused her pain, rendering them powerless.

[5][22] The following year, in 2018, Moon took on the lead role in the romance drama Tempted, based on the 18th century French novel Les Liaisons dangereuses.

[27][28] She portrayed Han Soo-yeon, the first love interest of three best friends (played by Lee Yi-kyung, Kim Seon-ho), and Shin Hyun-soo).

She meets Lee Jung-hoon (Kim Dong-wook), a news anchor with hyperthymesia, a rare condition that allows him to remember nearly every moment in his life.

[31][32][33] Later in 2020, Moon took on the lead role of Lim Ju-kyung in the tvN series True Beauty, alongside Cha Eun-woo, Hwang In-youp, and Park Yoo-na, which aired in December 2020.

[34][35] It was based on the Line Webtoon of the same name by Yaongyi, which depicts a high school girl who, after being bullied and discriminated against because of being perceived as ugly, masters the art of makeup to transform herself into a true beautiful lady.

[36][37][38][39] In 2021, Moon and Yoon Kye-sang starred in the music video for the song "Cheers" from the album "Reconnect" by AKMU's Lee Chan-hyuk, Colde, and Sogumm, which was produced by Code Kunst.

This project was part of Elle Korea's 'Reconnect 2021' initiative, which aims to support courage and youth in the midst of challenging daily life.

Meanwhile, Yeo Jin-goo played the character of Eun Gye-hoon, a sous chef at Jihwayang restaurant and Da-hyun's love interest.

[45] She played Ahn Soo-young, a head teller at KCU Bank's Yeongpo branch, who views love as fragile like a sandcastle.

[46] In February 2024, Moon made her debut as a writer with the publication of her first prose collection, Pata, which explores her inner thoughts and reflections.

The high pre-order sales quickly led to a second printing being confirmed, which is seen as a notable accomplishment in South Korea's publishing industry.

[51] On July 12, the television network tvN announced that Moon and Choi Hyun-wook have been cast in mini-series Black Salt Dragon.