Lord of the Rings actor Sir Ian McKellen has joined the cast of The Magic Roundabout, a computer animated version of a classic kids' show.
He'll provide the voice of Zebedee, a bouncy character on a spring. He joins a cast which includes stars like Robbie Williams and Kylie Minogue.
The original show was on TV in the 1960s, and went on for 12 years, so your parents may well have been fans.
The film, being made by the team behind Chicken Run, should be out in 2005.