Olivia Colman and Matt Smith have been announced for the cast of Superworm, an animated adaptation airing on BBC One this Christmas.
The half-hour story comes from Donaldson and Scheffler, creators of The Gruffalo, and follows the titular hero as he comes to the rescue of fellow animals and insects in distress.
Colman will provide the voice of the narrator, while Smith will voice Superworm, Patricia Allison will voice Butterfly and Rob Brydon will play the Crow.
"This is such a lovely project to be involved with," said Colman. "When reading the script, and imagining all those goings on at the end of the garden, I could really get a feel for the pure fun and joy that the film will bring.
"I've always loved these charming productions at Christmas and I'm delighted to be voicing the narrator."
Smith added: "I'm delighted to play the part of Superworm! And join such a fabulous cast of actors, artists and storytellers.
"What fun to be part of the BBC's Christmas line up in this great children's tale."
Superworm will be the ninth Donaldson and Scheffler adaptation for BBC One and follows on from Zog and the Flying Doctors, which brought in 7 million viewers on Christmas Day 2020.
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