Sir Ian McKellen is to voice the character of Zebedee in a computer animated version of the children's TV classic The Magic Roundabout.
A spokesman for Sir Ian said the actor was 'delighted'
The Lord of the Rings star has already recorded the voice for the film which is due out next year.
He joins Kylie Minogue and Robbie Williams, who provide the voices of Florence and shaggy-haired dog Dougal.
The original was made in the 1960s by Frenchman Serge Danot and adapted into English and aired on BBC One.
Actress Emma Thompson's father Eric created the programme's storylines and characterisation when the programme was broadcast on the BBC from 1965 to 1977.
Pathe Pictures hopes the film will be a massive success
A spokeswoman for Sir Ian, who played Gandalf in The Lord of the Rings trilogy, said: "He's delighted to be involved.
"He thinks The Magic Roundabout is a great project and fantastic for kids and
Also in the cast are Joanna Lumley, who provides the voice of Ermintrude the Cow, and Jim Broadbent as Brian the Snail.
Love Actually star Bill Nighy is set to be the voice of rabbit Dylan.
The Dave Borthwick-directed movie, which is due for release in early 2005, will also feature some new characters, including Ray Winstone as the voice of Soldier Sam.