Dylan Mulvaney (born December 29, 1996) is an American social media personality and actress who is best known for detailing her gender transition in daily videos published on TikTok since early 2022. Before coming out as a transgender woman and launching her internet career, Mulvaney performed as a stage actor in Broadway national tours and in Off-Broadway and Old Globe Theatre productions. She gained a higher profile on social media platforms after her interview with U.S. president Joe Biden at the White House in October 2022, during which they spoke about transgender rights. After Bud Light sent a beer can with her face printed on it to Mulvaney for an Instagram promotion in 2023, American conservatives led a boycott of the brand.

By 2023, Mulvaney had more than 10 million followers on TikTok, while her video series, Days of Girlhood, had received over one billion views. In 2023, Mulvaney received a Queerties Groundbreaker Award, a Streamy Award, and Attitude's Woman of the Year Award. She was named to the Forbes 30 Under 30 list in November 2023. In 2024, Mulvaney released her debut single "Days of Girlhood" through the independent digital music distribution service DistroKid, which reached #1 on the Genius lyrics chart within a week of its release. In 2025, Mulvaney released her memoir, Paper Doll: Notes from a Late Bloomer, and returned to acting, with multiple stage appearances and a guest appearance in the Apple TV+ historical drama series The Buccaneers.

Mulvaney was born on December 29, 1996, in San Diego, and grew up in Del Mar Heights and Carmel Valley. She was raised in a devout Catholic family. Mulvaney's father, James F. Mulvaney Jr., is an insurance executive and philanthropist. She is the granddaughter of James F. Mulvaney Sr., an investment banker and attorney who was the president of the United States National Bank of San Diego and the president of the San Diego Padres.

Mulvaney attended Cathedral Catholic High School, where she was a member of the glee club. She graduated from the University of Cincinnati's College-Conservatory of Music in 2019 with a Bachelor of Fine Arts in musical theater.

Following her graduation from college, Mulvaney acted in the role of Elder White in the musical The Book of Mormon; the role led her to tour the U.S., Mexico, and Canada. Other acting roles included How The Grinch Stole Christmas! at the Old Globe Theatre; 8 at the Birch North Park Theatre; Next to Normal at Arts Off Broadway; Legally Blonde; Spring Awakening; Bye Bye Birdie; and High School Musical at ACT San Diego.

Around the onset of the COVID-19 pandemic, in 2020, Mulvaney began posting videos to TikTok, which usually garnered a few hundred thousand views. She came out as a trans woman during the pandemic, while living with her "very conservative family" at her childhood home in San Diego, and she began to document her gender transition in a daily series of videos published on TikTok titled "Days of Girlhood" in March 2022, which began to gain in popularity. She said in an interview:

When the pandemic hit, I was doing the Broadway musical Book of Mormon. I found myself jobless and without the creative means to do what I loved. I downloaded TikTok, assuming it was a kids' app. Once I came out as a woman, I made this "day one of being a girl" comedic video. And it blew up. I really don't know another place online like TikTok that can make a creator grow at the rate that it does. Some of these other apps really celebrate perfection and over-editing and flawlessness. I think with TikTok specifically, people love the rawness. They love people just talking to the camera. I try to approach every video like a FaceTime with a friend.

In September 2022, she made her modeling debut at New York Fashion Week walking the runway for Jessica Jade.