About Aidan Gallagher
Born 2003. Aidan Gallagher is an American actor, musician, singer and goodwill ambassador.
Aidan Gallagher (born September 18, 2003) is an American actor and musician. His first major television role was Nicky Harper on the Nickelodeon sitcom Nicky, Ricky, Dicky & Dawn. In 2019, Gallagher began portraying Number Five on the Netflix superhero series The Umbrella Academy, which is his breakthrough role and has brought him widespread recognition and critical acclaim. In 2018, Gallagher was appointed as a UN Environment Goodwill Ambassador for North America, becoming one of the youngest people to hold the position. He then landed a major role in Nickelodeon's Nicky, Ricky, Dicky & Dawn as Nicky Harper, for which he was nominated Favorite Male TV Star in the Nickelodeon Kids' Choice Awards in 2016 and 2017. He was in the show for four seasons until it ended in 2018.
In February 2019, Gallagher began starring in the Netflix superhero series The Umbrella Academy, an adaptation of the comic book series of the same name, as Number Five, a 58-year-old time traveler who is stuck inside the body of his 13-year-old self due to an accidental time jump. His portrayal won him critical praise; as The New York Times''' reviewer put it, he "carries the show as far as he can". Daniel Fienberg of The Hollywood Reporter wrote that "Gallagher is very good in the tricky part of a fifty-something-year-old man trapped in the body of a schoolboy".
Music In addition to his acting career, Gallagher is a singer, songwriter, and musician. He began releasing songs independently in 2018 starting with "Blue Neon" through his YouTube channel. The following year, he collaborated with The Voice contestant Trinity Rose on a duet track "Miss You". He released two more singles, "Time" and "For You" in that same year. On January 5, 2020, Gallagher embarked on his first headlining tour, the "Blue Neon Tour" and was scheduled to perform at South by Southwest, but was later cancelled due to the COVID-19 pandemic. Later that year, he released two singles: "I Love You" on March 20 and "4th of July" on July 4, the latter of which he started working on while filming the second season of The Umbrella Academy.
Personal life Gallagher is active on environmental issues, and has served as a youth advocate for a number of environmental organizations, including Waterkeeper Alliance, WildAid and Oceanic Preservation Society. In 2018, he was listed in Variety's Hollywood Youth Impact Report, and was appointed as a UN Environment Goodwill Ambassador for North America, one of the youngest ever UN Goodwill Ambassadors to be so-named. In the year 2021, he gave an interview for the fashion magazine Vanity Teen'', reviewing his career and his social influence on youth.
Gallagher is vegan
Filmography
Film Year Title Role Notes 2013 You & Me Young David Short film
Television Year Title Role Notes 2013 Modern Family Alec Episode: "The Wow Factor"; uncredited 2013Jacked UpEvanUnsold pilot Kids' Choice Award Favorite Male TV Star Nicky, Ricky, Dicky & Dawn 2017
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Important facts
People in Aidan Gallagher's life
Named in this biography and alive at the same time
Contemporaries
People whose lives overlapped Aidan Gallagher's
Frequently asked questions
Who is Aidan Gallagher?
American actor
When was Aidan Gallagher born?
Aidan Gallagher was born on 18 September 2003 in Los Angeles.
What is Aidan Gallagher's occupation?
Aidan Gallagher is an actor, musician, singer and goodwill ambassador.
What nationality is Aidan Gallagher?
Aidan Gallagher is American.
Sources & further reading
Cite this page
APA: Biography.guide. (2026). Aidan Gallagher. https://biography.guide/aidan-gallagher/
MLA: "Aidan Gallagher." Biography.guide, https://biography.guide/aidan-gallagher/.
Chicago: "Aidan Gallagher." Biography.guide. https://biography.guide/aidan-gallagher/.
Data last updated: 2026-09-24 · Spot an error? Report a correction.
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