Colley played the role of Les in the musical
Newsies between March 11, 2013, and February 2, 2014. In January 2014, it was announced that Colley would play the role of Gavroche in the Broadway revival of
Les Misérables, alternating in that role with
Gaten Matarazzo. Colley started with the show when it began previews on March 1, 2014, and performed until March 1, 2015.
The Huffington Post called Colley's performance "'grounded and believable and anything but an outtake from
Oliver!" In 2014, Colley was cast as the voice of
Pig Robinson in the
Nick Jr. Channel animated television show
Peter Rabbit. He voiced the role from 2014 to 2015. Colley played the lead role in ''
You're a Good Man, Charlie Brown'' at the York Theater Company from May 24, 2016, to June 26, 2016. The cast album was released on November 18, 2016, by Broadway Records. He took one week off of the run to perform in
The Little Mermaid at the Hollywood Bowl. Colley played the role of Flounder, alongside
Sara Bareilles,
Tituss Burgess,
John Stamos, and
Rebel Wilson in the first week of June 2016. In 2021, he joined the cast of Hulu's
Sex Appeal as well as American
comedy film Senior Year. In the third and final season of the coming-of-age series
Love, Victor, Colley portrayed Liam, Victor's sharp-tongued classmate. In 2024, he appeared as Monty, a crow turned into a teenaged boy, in the first season of the Netflix series
Dead Boy Detectives. He plays a teen version of
Captain Hook in the 2024
Disney+ film
Descendants: The Rise of Red. Colley is currently starring as
Orpheus in
Hadestown on Broadway, and began the role in early March 2026. ==Personal life==