Aisling Bea as Gemma

Billie Lourd as Audrey

Colin Hanks as Nathan

Susan Wokoma as Ruth

Omari Douglas as Mo

Arthur Darvill as Dylan

Sinéad Cusack as Lorraine

Peter Egan as Derek

Elizabeth McGovern as Margaret

Harriet Walter as Lord Chief Justice Amanda Vaughn

Samuel Barnett as Alan

Paul Kaye as Ian

Nish Kumar as Tim Giggs

Divian Ladwa as Dr. Fasli

Emilio Doorgasingh as Neil Ashford

Janet Fullerlove as Aunt Kathy

Mark Davison as David (Paramedic)

Al Roberts as Daniel (paramedic)

Gerald Kyd as David

Abby Vicky-Russell as Wedding Dressmaker

Sunil Patel as Krish

Bryony Davies as Event Coordinator