Stephen Mangan
Postman Pat (voice)

Jim Broadbent
CEO (voice)

Rupert Grint
Josh (voice)

David Tennant
Wilf (voice)

Ronan Keating
Postman Pat (singing voice)

Susan Duerden
Sara Clifton (voice)

Sandra Teles
Julian Clifton (voice)

T.J. Ramini
Ben Taylor (voice)

Peter Woodward
Carbunkle (voice)

Robin Atkin Downes
Simon Cowbell (voice)

Brian George
Ajay Bains (voice)

Parminder Nagra
Nisha Bains (voice)

Jo Wyatt
Meera Brains (voice)

Enn Reitel
PC Selby / Reverend Timms / Pat Wannabe 2 / Raed (voice)

Jane Carr
Mrs. Goggins / Granny (voice)

Dan Hildebrand
Ted Glenn (voice)

Darren Richardson
Alf Thompson / SDS Employee 2 (voice)

Jacob Witkin
George Lancaster / Major Forbes (voice)

Jean Gilpin
Miss Hubbard / Crowd Lady / Pat Wannabe 3 (voice)

Anastasia Griffin
Dr. Sylvia Gilbertson / Lauren Taylor (voice)