(Borrowing heavily from the Downton Abbey cast, as you can see...)

• Skandar Keynes as Harry Potter
• Simon Woods as Ron Weasley
• Kate Maberly as Hermione Granger
• Ben Kingsley as Lord Voldemort
• Greg Wise or Paul McGann as Sirius Black
• Richard Armitage as Snape
• Mark Wells as the adult James Potter
• Zoe Boyle as the adult Lily Evans
• Freddie Highmore as Neville Longbottom
• Henry Cavill as Cedric Diggory
• Sally Hawkins as Tonks
• Phyllis Logan as Professor McGonagall
• Rob James-Collier as Tom Riddle
• Lesley Nicol as Molly Weasley
• Iain Glen as Lucius Malfoy
• Rosamund Pike as Narcissa Malfoy
• Evanna Lynch as Luna Lovegood
• Chiwetel Ejiofor as Kingsley Shacklebolt
• Samuel Anderson as Dean Thomas
• Lea Seydoux as Fleur Delacour
• Billy Connolly as Xeno Lovegood
• James D'Arcy as Barty Crouch, Jr.