I Swear (2025) Cast & Character Guide — No Spoilers | Who's That?

Who plays who in I Swear (2025)? Browse a spoiler-free character guide with photos of every major character and the actors behind them, including Robert Aramayo, Maxine Peake, Peter Mullan.

• John — played by Robert Aramayo
• Dottie — played by Maxine Peake
• Tommy — played by Peter Mullan
• Heather — played by Shirley Henderson
• Young John — played by Scott Ellis Watson
• Chris — played by David Carlyle
• Murray — played by Francesco Piacentini-Smith
• Palace Official — played by Somerled Campbell
• Butler — played by Michael Dylan
• The Queen — played by Christina Ashford
• Kenny — played by Sanjeev Kohli
• David — played by Steven Cree
• William (10) — played by Ethan Stewart
• Caroline (7) — played by Isla Mercer
• Sharon (13) — played by Catriona McArthur
• Billie Dean / Attacker Under Bridge — played by Paul Donnelly
• Headmaster Donald Watkins — played by Ron Donachie
• Young Murray (12) — played by Jamie McAllister
• Kerry (12) — played by Abigail Noon
• Teacher — played by Ella Victoria Robb