Beanie Feldstein as Johanna Morrigan

Paddy Considine as Pat Morrigan

Sarah Solemani as Angie Morrigan

Alfie Allen as John Kite

Frank Dillane as Tony Rich

Laurie Kynaston as Krissi Morrigan

Arinzé Kene as Kenny

Tadhg Murphy as Andy Rock

Ziggy Heath as Derby

Bobby Schofield as Pricey

Chris O'Dowd as Alan 'Wilko' Wilkinson

Joanna Scanlan as Mrs. Belling

Emma Thompson as Amanda

Dónal Finn as Karl Boden

Stellan Powell as Lupin Morrigan

Freya Perry as Morrigan Twin

Harper Perry as Morrigan Twin

Violet Amer as Morrigan Twin

Andi Oliver as Donna Summer

Michael Sheen as Sigmund Freud

Sue Perkins as Emily Bronte

Mel Giedroyc as Charlotte Bronte

Alexei Sayle as Karl Marx

Lily Allen as Elizabeth Taylor

Gemma Arterton as Maria Von Trapp

Jameela Jamil as Cleopatra

Lucy Punch as Sylvia Plath

Sharon Horgan as Jo March

Ralph Prosser as Lee Veltman

Johnny Mindlin as Sound Man

Samantha Morrish as Female TV Runner

Vicki Pepperdine as Smart DSS Woman

Patsy Ferran as Snow Pixie

Asheq Akhtar as Mr. Sanghera

Edward Bluemel as Strange Cases Manager

Hammed Animashaun as Ed Edwards

Tobi Bamtefa as Gig Doorman

Oliver Barrs as Hallows Drummer

Antony Somers as Press Officer

Bob Mortimer as Awards Host

Ciara May Wilson as Goth School Girl

John Peters as Cab Driver

Sonia Goswami as Pediatrician Alex Slade (uncredited)

Ryan Nolan as Damon Yardley (uncredited)

Sean Coleman as Classmate (Uncredited)