Fionn O'Shea as Ned Roche

Nicholas Galitzine as Conor Masters

Andrew Scott as Dan Sherry

Ardal O'Hanlon as Donal Roche

Amy Huberman as Natalie Roche

Ruairí O'Connor as Weasel

Michael McElhatton as Walter Curly

Moe Dunford as Pascal O'Keeffe

Mark Doherty as Mr. Cunningham

Hugh O'Conor as Sex Instructor

Norma Sheahan as Lindy Masters

Stephen Hogan as Conor's Dad

Lauterio Zamparelli as Arthur

Eoin Griffin as Cheerleader

Patrick McDonnell as Fr. Flakey

Jay Duffy as Victor

Mark Lavery as Wallace

Jamie Hallahan as Spainer