Martin Freeman as Matt

Jessica Hynes as Sam (as Jessica Stevenson)

Olivia Colman as Joanna

Robert Webb as Michael

Stephen Mangan as Josef

Meredith MacNeill as Isabelle

Vincent Franklin as Archie

Jason Watkins as Gregory

Felicity Montagu as Vivian

Jimmy Carr as Antony

Marc Wootton as Snoopy

Alison Steadman as Sam's Mum

Sarah Hadland as Jen

Ron Cook as Sam's Dad

Julia Davis as Counsellor

Selina Cadell as Joanna's Mum

Phil Nichol as Judge

Caroline Reid as Judge

Nickolas Grace as Judge

Mark Heap as Registrar

Helen Ryan as Naturist Violinist

Clare-Louise English as Jodie Upp

Tina Yates as Naturist

Jill Goldston as Musical Dancer