Vanessa Hudgens as Fiona Pembroke / Lady Margaret / Stacy

Remy Hii as Peter Maxwell

Sam Palladio as Prince Edward

Nick Sagar as Prince Kevin

Amanda Donohoe as Bianca Pembroke

Florence Hall as Mindy

Ricky Norwood as Reggie

Suanne Braun as Mrs. Donatelli

Sian Ejiwunmi-Le Berre as Inspector Moretti

Mark Fleischmann as Frank

Will Kemp as Hunter Cunard

Robin Soans as Elf Man

Mia Lloyd as Olivia

Hazel Beattie as Mother Superior

Femi Elufowoju Jr. as Cardinal Aked Amoah

Maia Katelyn Swandi as Young Fiona

Eden Gough as Young Peter

Julie Neubert as Sister Disapproval

Jayda Eyles as Agnes

Emilio Doorgasingh as Review Committee Chairman

Matt Lavall as Beefy Security Guard #1

Chidi Ajufo as Black Suit Security Guard #2

Joe Gallina as Itai Kraus Security Guard #3

Julie Cullen as Hunter's Staff Member

Akil Largie as Santa

Theo Devaney as Simon

Billy Keddie as Montenaro Palace Staff

Ophir Raray as Montenaro Palace Staff

Barry Smith as Montenaro Palace Staff

Kamara Barnett as Montenaro Palace Staff

Maddy Bryce as Montenaro Palace Staff

Joe McKay as Montenaro Palace Staff

Rebecca Banatvala as TV Reporter Kay Brock (uncredited)

Ben Bradley as Stall Holder (uncredited)

Tom Megaughin as 90s School Boy (uncredited)

Leon Stewart as TV Anchor (uncredited)

Holly Woodhouse as Member of the Judiciary (uncredited)