Netflix has today announced new cast members for the third season of Heartstopper, which includes Jonathon Bailey (Fellow Travelers and Bridgerton), Hayley Atwell (Captain America: The First Avenger and Mission: Impossible - Dead Reckoning Part One) and Eddie Marsan (Back to Black and Ray Donovan).

Following a highly-acclaimed second season last summer, the season 3 follow-up is set to hit Netflix this October.

Atwell will play Diane, Nick’s (Kit Connor) aunt who takes him for a summer holiday to Menorca and imparts some hard wisdom about his relationship with Charlie (Joe Locke).

Marsan will take on the role of Geoff, Charlie’s wise and outspoken therapist who first appeared in the Heartstopper graphic novels. Bailey will make a cameo appearance as Jack Maddox, a viral classicist and celebrity crush of Charlie.

"It was an absolute joy to see Hayley, Eddie, and Jonathan’s talent alongside our existing cast, and I can’t wait for the Heartstopper fans to meet these new characters,” says writer and series creator Alice Oseman.