In 2024, he starred as producer Lorne Michaels in the biographical film Saturday Night, for which he received a nomination for a Golden Globe Award for Best Actor.

LaBelle made his on-screen acting debut in 2013 on an episode of the Canadian TV series Motive in a guest role, thanks to his father landing his son an agent and being a producer on the show.

[3] Following his audition, he was initially not cast in the role until he received a virtual callback three months later, with Spielberg, Tolan and 38 other representatives in attendance, where he then won the part.

[14] In 2022, LaBelle joined the cast of the Showtime series adaptation of American Gigolo, in the role of the young version of Julian Kaye, played by Jon Bernthal.

[19][20] In 2024, LaBelle played one of the lead roles in Adam Carter Rehmeier's coming-of-age comedy Snack Shack, which was delayed by the 2023 Hollywood labor disputes.