Aidan Gallagher, born on September 18, 2003, is an American actor and musician based in Los Angeles, California. He first gained recognition playing Nicky Harper on Nickelodeon’s Nicky, Ricky, Dicky and Dawn, before breaking through globally as Number Five in Netflix’s The Umbrella Academy.
In June 2018, he also made history as the youngest person ever designated a UN Environment Goodwill Ambassador.
Who is Aidan Gallagher?
Aidan Gallagher is an American actor, musician, and environmental activist. He began acting at age nine and built his name through children’s television before landing one of the most demanding young roles in recent streaming history.
His portrayal of Number Five in The Umbrella Academy on Netflix brought him international recognition. The character is a 58-year-old time traveler trapped inside a teenager’s body, a role that required him to project the gravitas and world-weariness of a much older man.
Beyond acting, Gallagher independently writes, produces, and releases his own music. He plays guitar, piano, bass, and keyboard, and has released multiple self-produced singles since 2018.
His environmental advocacy work runs alongside both careers. In 2018, the United Nations Environment Programme designated him Goodwill Ambassador for North America, the youngest person in history to hold that position.
He is also a vegan and has spoken publicly about the role of diet in environmental activism. His music has accumulated over 76 million total streams across platforms.
Early Life of Aidan Gallagher
Aidan Ryan Gallagher grew up in Los Angeles, California, the entertainment capital of the world. His father, Rob Gallagher, works as a businessman, and his mother, Lauren Gallagher, is a housewife. Both parents appeared in photos on his Instagram account and expressed strong support for his career.
From a young age, Gallagher showed a deep curiosity about production and creative work. By the time he was around eight years old, he spent time with friends filming stop-motion videos with Legos and shooting short action films in his neighborhood.
He also grew up spending time in local comic book shops, developing a love for graphic novels. That early passion for comic storytelling became directly relevant when he later auditioned for The Umbrella Academy, which is based on a comic book series by Gerard Way and Gabriel Ba.
Aidan Gallagher Age
Aidan Gallagher is 22 years old as of 2026, born on September 18, 2003. His zodiac sign is Virgo.
By the time he turned 14, he had already starred in four seasons of a hit Nickelodeon series and been named a UN Goodwill Ambassador.
Aidan Gallagher Ethnicity and Nationality
Aidan Gallagher is American by nationality, born and raised in Los Angeles, California. He was raised Jewish, a heritage he has acknowledged publicly.
He adopted a vegan lifestyle in 2015 at age 12, motivated by the environmental impact of animal agriculture.
Aidan Gallagher Height and Weight
Aidan Gallagher stands approximately 5 feet 5 inches tall, equivalent to about 1.65 meters. His weight is not publicly confirmed.
He has a slim build and a distinct on-screen presence that helped him convincingly portray Number Five across four seasons of The Umbrella Academy.
His slight frame actually worked in favor of the character, who physically looks like a teenager despite being mentally 58 years old.
Aidan Gallagher Education
Gallagher completed his early schooling in the Los Angeles area before transitioning to homeschooling. Pursuing an acting career from a young age made a traditional school schedule difficult to maintain.
Homeschooling allowed him to balance his professional career with his academic studies. He did not publicly confirm which specific institutions he attended before making the switch.
Aidan Gallagher Career
Aidan Gallagher began his professional acting career in 2013, when he was nine years old.
His parents enrolled him in acting classes after recognizing his interest, which quickly led to professional auditions in Los Angeles.
The entertainment industry took notice fast. Within his first year of auditioning, he landed roles in multiple projects simultaneously, setting the stage for an unusually fast rise.
Early Career
Gallagher’s very first professional role came in a 2013 episode of the Emmy-winning series Modern Family, where he played a character named Akec. That same year, he appeared in the CBS television pilot Jacked Up and starred in the short film You and Me.
The CBS pilot was not picked up and never aired, but the experience gave him valuable on-set training. That brief burst of activity in 2013 was enough to get him serious attention from casting directors.
In September 2014, Nickelodeon premiered Nicky, Ricky, Dicky and Dawn. Gallagher played Nicky Harper, one of a set of quadruplets, starring alongside Casey Simpson, Mace Coronel, and Lizzy Greene.
The show ran for four seasons and 82 episodes, concluding on August 4, 2018.
Breakthrough: The Umbrella Academy
In 2017, Gallagher auditioned for the Netflix superhero series The Umbrella Academy and won the role of Number Five. The show premiered on Netflix on February 15, 2019, and became an immediate global hit.
His character is a 58-year-old man stuck in the body of a 13-year-old after a time travel accident. Show creator Steve Blackman described being blown away by Gallagher’s audition, noting that the role required a very specific gravitas to pull off convincingly.
Critics praised his performance across all seasons. David Betancourt of The Washington Post called his work one of the show’s main delights.
Daniel Fienberg of The Hollywood Reporter wrote that Gallagher was very good in the tricky part of a fifty-something-year-old man trapped in a schoolboy’s body.
The New York Times reviewer noted he carries the show as far as he can. That critical recognition, alongside the show’s massive global audience, made him one of Netflix’s most recognized young stars.
The Umbrella Academy ran for four seasons total. Season 3 saw the main cast negotiate a pay raise to $200,000 per episode. The final fourth season, consisting of six episodes, premiered on Netflix on August 8, 2024.
Music Career and Recent Work
Gallagher launched his music career independently in 2018, releasing his debut single “Blue Neon” through his YouTube channel. The track had a moody, indie-pop feel and showcased a vocal tone quite distinct from his on-screen personality.
In 2019, he collaborated with The Voice contestant Trinity Rose on the duet “Miss You.” That same year, he released two more self-produced singles: “Time” and “For You.” All tracks he wrote, produced, and released without a label.
In 2020, he released “I Love You” on March 20 and “4th of July” on July 4. He had worked on the latter while filming the second season of The Umbrella Academy. His song “4th of July” went on to win a People’s Choice Award in the Annual Independent Music Awards.
Gallagher was selected for the prestigious Big Break Accelerator Program Showcase at South by Southwest 2020, making him the youngest solo artist ever chosen to perform at the festival. The live show was later canceled due to the COVID-19 pandemic.
His six debut music video releases earned over 30 million combined views on YouTube. Total streams across platforms reached more than 76 million. As of 2026, he is finishing work on his debut full studio album.
In 2020, IMDb named him the number 2 Breakout Star of the year and number 7 on its Top 10 Stars of 2020 list.
Aidan Gallagher Awards and Recognition
Nickelodeon nominated Gallagher for Favorite Male TV Star at the Kids’ Choice Awards in both 2016 and 2017 for his work on Nicky, Ricky, Dicky and Dawn. He also hosted the Kids’ Choice Sports Awards.
In August 2018, Variety included him in its Power of Young Hollywood Ones to Watch list, naming him one of the top actors under the age of 25. That same year, he appeared in Variety’s Hollywood Youth Impact Report.
His music has earned recognition in the Unsigned Only music competition and the International Songwriting Competition. His song “4th of July” took a People’s Choice Winner Award at the Annual Independent Music Awards.
IMDb ranked him the number 2 Breakout Star of 2020 and number 7 on its most popular stars list that year. His UN Goodwill Ambassador designation in 2018 also represented a public recognition of his environmental leadership.
Aidan Gallagher Environmental Advocacy
Gallagher began his advocacy work through youth organizations in Los Angeles. He volunteered with Waterkeeper Alliance, WildAid, and the Oceanic Preservation Society before his UN appointment.
In June 2018, he became the youngest person in history to receive a UN Environment Goodwill Ambassador designation. He took on the role at age 14 and served as the face of multiple UN climate initiatives in the years that followed.
His high-profile advocacy moments include hosting the 2018 Illegal Wildlife Trade Conference in London, an event organized by invitation of the UK Government and the then Duke of Cambridge, Prince William. Gallagher introduced Prince William to the stage during that event.
In 2019, he spoke at the Global Climate Action Summit. That same year, he gave a climate speech to world youth at the One Young World Conference. Environmental interviews with him have appeared on CNN, Bloomberg News, and in New Scientist magazine.
In 2021, he launched the Trees with Aidan initiative alongside Envision Racing’s Race Against Climate Change campaign, with a joint goal of inspiring one million tree plantings.
Aidan Gallagher Wife
Aidan Gallagher is not married. He keeps his personal life private, and there is no public record of him having a wife and children.
Aidan Gallagher Net Worth
Aidan Gallagher’s estimated net worth is $2 million as of 2026. His income comes from his acting career on Nickelodeon and Netflix, his independent music releases, and his social media presence across multiple platforms.
Gallagher’s casting in The Umbrella Academy’s later seasons, during which the main cast negotiated $200,000 per episode, contributed substantially to his earnings.
His music catalog continues to generate streaming royalties, with over 76 million streams accumulated across platforms.
His large following on social media also generates income through brand partnerships and sponsorship opportunities tied to his environmental advocacy platform.
Aidan Gallagher Social Media
Aidan Gallagher is active across multiple platforms. On Instagram, he posts under the handle @aidanrgallagher. His feed covers his music, acting work, and environmental advocacy posts.
He also maintains a YouTube channel where he releases his music videos and self-produced content. His six debut music video releases accumulated over 30 million combined views on the platform.
His official website is aidanrgallagher.com, where fans can find updates on his music, acting, and advocacy work.
The Bottom Line
Aidan Gallagher starred in all four seasons of The Umbrella Academy on Netflix, with the final season releasing on August 8, 2024. Critics at The Washington Post, The New York Times, and The Hollywood Reporter all singled out his performance as the standout element of the show.
He grew up in Los Angeles in a Jewish household, adopted a vegan lifestyle at age 12, and became the youngest UN Goodwill Ambassador in history at age 14. His interests in music, acting, and environmental activism have run alongside each other throughout his career.
As of 2026, Gallagher is completing work on his debut full studio album while continuing his role as a UN Environment Goodwill Ambassador.
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