Person in history

Aidan Gallagher

Aidan Gallagher, American actor and musician

Life at a glance

Born
2003 · September 18
Age this year
23No death recorded in our data
Known as
actor, musician, singer, and goodwill ambassador. Citizenship: United States
Born
23rd anniversary of their birth this year

Their story

Who they were

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 . [ 1 ] [ 2 ] 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. [ 3 ] [ 4 ] [ 5 ] In the year 2021,

Aidan Gallagher 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.

Path and career

Career Acting Gallagher first appeared in a minor role in a 2013 episode of Modern Family . He was in the short film You & Me and was in the CBS television pilot Jacked Up , which was not picked up and never aired. [ 1 ] [ 2 ] He then landed a major role in Nickelodeon's Nicky, Ricky, Dicky & Dawn as Nicky Harper, [ 3 ] for which he was nominated Favorite Male TV Star in the Nickelodeon Kids' Choice Awards in 2016 and 2017. [ 4 ] [ 5 ]

Why this date

Aidan Gallagher appears on our September 18 calendar for 2003 as a birth entry.

The world when they were born

Other entries we record for 2003.

Everything from 2003 →

Born the same day

Contemporaries — born the same year

Sources

Cite this page

“Aidan Gallagher”, What's On This Date, https://whatsonthisdate.com/app/people/aidan-gallagher, accessed October 27, 2026.

Cite the underlying source as well — the source links above go to the record this entry is adapted from.

Questions about Aidan Gallagher

When was Aidan Gallagher born?

September 18 2003.

How old would Aidan Gallagher be today?

23 this year, based on the birth year we hold. We have no death record for them in our data, which is not proof either way.

Who else was born on September 18?

Conor Timmins, Anthony Gonzalez (politician), Mirza Teletović and others — the list is on this page and on the date page.

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