[9][10][11] During her elementary school years, she participated in a group reading and presentation of a play called "The One-Legged Goose" from a Korean language textbook.

[12] While attending Busan Dongho Information Girls' High School, she watched her first musical, Grease, which further solidified her dream of becoming a theater actress.

[9] In her third year, her friend asked her to join as a vocalist for a female band called 'Dali,' with four members, each in charge of vocals, guitar, bass, and drums.

Her performance received much praise, as she successfully portrayed five different roles, from a high school girl to a teacher, to a nurse, a cafe madam, and a stepmother, displaying her versatility as an actress.

The play revolves around Agnes, a 21-year-old nun with a pure soul, and her interactions with Dr. Livingston, portrayed by veteran actress Yoon Seok-hwa.

[22] To break away from the image associated with her role in the play Agnes of God, Jeon decided to audition for "Finding Kim Jong-wook," a romantic comedy musical, in 2009.

The musical is based on the last year of An Jung-geun's life, from when he planned Itō Hirobumi's assassination in Harbin to his execution following his death sentence.

Lady-in-Waiting Choi's statement pointed to Lady Ja-sook, who had departed from her residence, and Gu-dong, a eunuch who had left his post around the time of the crown prince's disappearance, as possible suspects.

As the investigation continued, the focus of the case unexpectedly changed to the sweet and innocent love story between Ja-sook and Gu-dong.

Middle-aged famous actress Archaina (Woo Hyeon-joo) arrives at her country home, accompanied by her lover, the renowned writer Trigorin (Park Ho-san).

Archaina's son, Treplev (Park Hae-soo), prepares a new type of performance with his aspiring actress girlfriend, Nina (Jeon Mi-do), who dreams of a career on stage.

Kang Pil-seok and Kim Woo-hyung, who had previously collaborated in "Doctor Zhivago," portrayed Tae-hee's lovers, In-woo.

She shared the stage with Jung Dong-hwan, who portrayed Firs, while the character of Zhiju Lopakhin was double cast, with Park Ho-san and Lee Seok-jun taking turns in the role.

[35] It was also invited to the 'Stanislavsky Birth 150th Anniversary Festival' in early February 2013, held at the Stanislavsky Theater in Moscow, although Jeon did not participate in that particular event.

[48] Additionally, amidst her involvement in 'Man of La Mancha', Jeon also became part of the cast of Maybe Happy Ending, a musical that was planned by Hue Park and Will Aronson in February 2014 and pitched to the Wooran Cultural Foundation in Seoul.

[62] An encore performance was held at the same venue, Lifeway Hall in DCF Daemyung Cultural Factory 2nd Building, from October 23, 2017, to November 12, 2017.

[65][66] In November 2017, Jeon was cast in tvN 2018 series Mother portraying Ra-ra, Lee Seol-ak's (Son Seok-ku) former lover.

During the press call for the musical, Jeon mentioned that the line, "You can't just cry your whole life," best encapsulates Lara's character.

As fate would have it, Lara and Yuri Zhivago (played by Park Eun-tae and Ryu Jeong-han) meet again during the war and develop feelings for each other.

Jeon also mentions a conversation Lara has with her colleague Yelenka (played by Baek Jin-joo), where she describes their relationship as a "soft drug".

"[80] Shin also revealed at the online production press conference that Jeon was recommended by Jo Jung-suk and Yoo Yeon-seok, and that this also played a decisive role in her casting.

[87][88] For the drama's soundtrack, she sang a cover of Shin Hyo-beom's song "I Knew I Love" (사랑하게 될 줄 알았어) which was originally released in 2006.

[89] In 2020 encore of musical Maybe Happy Ending, Jeon Mi-do reprised her role as Claire in the production, joined kby actresses Kang Hye-in and Han Jae-ah.

In this season, the actors incorporated artificial feelings into their acting style and vocal tone to emphasize the identity of the robot character.

[92] Jeon reprised her role as Chae Song-hwa and started filming season 2 of medical drama Hospital Playlist in late January 2021.

[96] This 12-episode series is a remake of the Chinese drama Nothing But Thirty and revolves around the lives, friendships, romances, and love of three friends who are approaching the age of forty.

[99] Acting alongside Son Ye-jin and Kim Ji-hyun, Jeon's character holds a central role in the story.

[102] Jeon decided to reprise her role as Mrs. Lovett in the 2022 encore of the musical "Sweeney Todd" after initially hesitating due to scheduling conflicts.

[104] Jeon will portray Oh Yun-jin, a social affairs reporter for the Ahn Hyun Economic Daily, known for her assertiveness and outspoken nature.

[105] Connection is a television series created by Lee Hyun, directed by Kim Moon-gyo, and is set to premiere on SBS TV during the first half of 2024.