[4][5] Trevaldwyn began his career by posting comedic videos online, portraying an array of different characters.
[6][7][8][9] In April 2022, Trevaldwyn starred as Ollie Rogers in Ten Percent, the English remake of the French Call My Agent!.
[14] Trevaldwyn is due to feature in Sweet Sue, a film currently in post-production and starring Maggie O'Neill, Tony Pitts and Hannah Walters.
[15][16] In January 2024, Trevaldwyn was announced to portray Tuffnut Thorston in the live-action remake of How to Train Your Dragon.
[17] In July 2024, Trevaldwyn's episode of The Acolyte aired; he portrayed the Jedi Mog Adana.