Upon graduating from RADA, Mylchreest was cast in open-air productions of the Shakespeare plays
Romeo & Juliet and ''
A Midsummer Night's Dream'' directed by Abbey Wood. In 2022 he made his television debut in the premiere episode of the Netflix adaptation of
Neil Gaiman's
The Sandman. Also in 2022 it was announced Mylchreest would star as a young, fictionalised version of
King George III in the period drama prequel miniseries
Queen Charlotte: A Bridgerton Story, which was released on Netflix in May 2023. Karama Horne of
TheWrap was appreciative of the chemistry between Mylchreest and
India Amarteifio (who played the title role of
Queen Charlotte) and added that he "does a beautiful job wandering through the wilderness of King George’s mind without being campy". In June 2023 Mylchreest signed with
WME for representation. He made his
West End debut as
Edmund in
Kenneth Branagh's production of
King Lear at
Wyndham's Theatre. He has appeared in the second installment of the
Phelps twins' travel show
Fantastic Friends. He had a role in the Netflix political thriller
Hostage. In 2025, Mylchreest starred as a supporting lead in
My Oxford Year with
Sofia Carson. In November 2025, it was announced that Mylchreest will star in the thriller film
Banquet, directed by
Galder Gaztelu-Urrutia, alongside
Meghann Fahy,
Alfie Williams, and
Finbar Lynch, and will be produced by
David Yates. ==Filmography==