Olivia Colman joins cast, led by comedian David Walliams as the voice of the Britain’s Got Talent winner.

Pudsey the Dog: The Movie is set to be released in the UK on July 18, 2014.

Vertigo Films, Simon Cowell’s Syco Entertainment and ROAR Global also announced that British actress Olivia Colman will provide the voice for Nelly The Horse in the film, joining David Walliams who voices the eponymous canine.

Directed by Nick Moore and written by Paul Rose, the film also stars Jessica Hynes, John Sessions, Luke Neal, Izzy Meikle-Small and Luke Tittensor.

The film is produced by Vertigo’s Rupert Preston and Marshall Levitan and executive produced by Allan Niblo, James Richardson, Jonathan Shalit, Mark Brittain, Ben Todd, Nigel Williams and Jamie Carmichael with co-producer Michael Ford.

Content is selling international rights.