2012–2017: Early standup career Living in Chicago, Booster took a job as a copywriter and began to perform in theater and write jokes after work. Meanwhile, he started seeing similar success as a comedic writer and producer during this time period, writing for acclaimed comedies
Big Mouth,
Billy on the Street, and
The Other Two. In 2019, he started the podcast
Urgent Care with Joel Kim Booster + Mitra Jouhari with comedian
Mitra Jouhari under
Earwolf. Booster appeared on the December 8, 2020, episode of
The George Lucas Talk Show with fellow guest Eliza Skinner.
2022–present: Hollywood breakout and mainstream success Booster wrote and starred in the 2022 romantic comedy film
Fire Island, streaming on Hulu and inspired by
Pride and Prejudice. It is one of few mainstream gay films with a predominantly Asian American cast, and co-stars
Margaret Cho,
Bowen Yang, and
Conrad Ricamora. The film received positive reception and was noted for its cinematography, faithfulness to
Pride and Prejudice, and depiction of a loving friendship between Howie and Noah (played by Yang and Booster). In 2022, he released a stand-up special on Netflix called
Joel Kim Booster: Psychosexual. Abbey White of
The Hollywood Reporter described the special positively: "...
Psychosexual offers a hilariously biting deconstruction and reconstruction of Booster's identity onstage; a repudiation not only of himself as a representative or "role model" for his various communities, but an affirmation that as a comedian, his only job is to tell jokes — regardless of whether that speaks to any community at all." In September 2022, Booster performed alongside EDM DJ / Kawaii Metal Idol
Freya Fox and
Atsuko Okatsuka at Life is Beautiful in Las Vegas, CA. A clip of Booster's comedy game at Life is Beautiful "Joel Kim or Kim Jeong Un" vent viral on Freya Fox's TikTok, amassing over 500,000 views. In June 2025, it was announced that Booster would be performing at Belly Laughs, a new comedy and food festival in Los Angeles. In November 2025, Booster made it to the final round of the "8 Degrees of Jane" episode of Celebrity
Weakest Link. Accolades Booster was called a Comic to Watch by
Variety and one of
Vultures 20 Comedians You Should and Will Know, and was named a
Forbes' 30 Under 30 in Hollywood & Entertainment. ==Filmography==