The film that included actress Sharon Horgan and was directed by Gary Chapman was Valiant. Released in 2005, Valiant is an animated war comedy about a small pigeon recruited into Britain’s Royal Homing Pigeon Service during the Second World War.
Gary Chapman directed the film, which was produced by Vanguard Animation and distributed by Walt Disney Pictures. Its voice cast included Ewan McGregor as Valiant, Ricky Gervais as Bugsy, Tim Curry as General Von Talon, and John Cleese as Mercury. Sharon Horgan provided the voice of Charles De Girl, a character connected to the pigeon-training storyline.
The title refers to the young pigeon protagonist rather than a human soldier. That detail can make the film easy to confuse with other animated wartime adventures, but Valiant is specifically the 2005 production directed by Chapman. It was also notable for using a largely British voice cast and for turning the real wartime role of messenger pigeons into a family adventure.