Rachel McAdams as Sigrit Ericksdottir

Will Ferrell as Lars Erickssong

Pierce Brosnan as Erick Erickssong

Dan Stevens as Alexander Lemtov

Jamie Demetriou as Kevin Swain

Ólafur Darri Ólafsson as Neils Brongus

Melissanthi Mahut as Mita Xenakis

Joi Johannsson as Jorn

Björn Hlynur Haraldsson as Policeman - Arnar

Graham Norton as Graham Norton

Demi Lovato as Katiana

Jóhannes Haukur Jóhannesson as Johans

Bobby Lockwood as Jeff

Elena Saurel as Stage Manager

Julian Miller as Janus Skoene

Mikael Persbrandt as Victor Karlosson

Jon Kortajarena as Corin Vladvitch

Elina Alminas as Sasha

Alfrun Rose as Anna

Elin Petersdottir as Helka

Christopher Jeffers as Johnny John John

Rebecca Harrod as Brittny

Josh Zaré as Bill

Eleanor Williams as Jenn

Björn Stefánsson as Ian

Maxim De Villiers as French Voter

Chris Lew Kum Hoi as Jae-Bong

Tómas Lemarquis as Jiles

Smari Gunn as Lighting Assistant

Kajsa Mohammar as Lisa

Gudmundur Thorvaldsson as Man #1 (1974)

Arnar Jónsson as Man #2 (1974)

Natasia Demetriou as Nina

Hannes Óli Ágústsson as Olaf Yohansson

Hlynur Þorsteinsson as Policeman - Robert

William Lee Adams as William Lee Adams

Heidi Niemi as Stage Manager 2

Chris Beaumont as Steve Gunderson

Laura Hayden as The Wonder Four

Joshua Rumble as The Wonder Four

Harry Balazs as The Wonder Four

Jackson Couzens as The Wonder Four

Halldora Thoell as Woman #1 (1974)

Nína Dögg Filippusdóttir as Woman #2 (1974)

Alfie Melia as Young Lars

Mark Adams as Jon Ola Sand

Zack Propert as Stephan (Drummer)

Brie Kristiansen as Ros

Gunnar Cauthery as Aron

Milan van Weelden as 21st Century Viking

Alexander Tol as Dutch Voter

Andrei Zayats as Czech Republic Voter

Junior Delius as Dailbour Jinski - Belarus

Daniela Tocari as Romanian Voter

Tharan Sivapatham as Airport Attendant

Miguel Angelo as Portugal Voter

Eveline Suter as Swiss Voter

Tommy Ashby as White Snow

Lydia Clowes as White Snow

Aiste S. Gram as Aiste Gramantaite

Salvador Sobral as Salvador Sobral

Marcus Garvey as Eurovision Director

John Lundvik as John Lundvik

Anna Odobescu as Anna Odobescu

Bilal Hassani as Bilal Hassani

Loreen as Loreen

Jessy Matador as Jessy Matador

Alexander Rybak as Alexander Rybak

Jamala as Jamala

Elina Nechayeva as Elina Nechayeva

Conchita Wurst as Conchita Wurst

Netta as Netta

Sophia-Grace Donnelly as Young Sigrit

Trevor Allan Davies as Old Accordion Player

Spike Jefferson as Old Bass Player

Grant Crookes as Icelandic Bar Patron (uncredited)

Jodie Cuaresma as Icelandic Punter (uncredited)