You may not have heard of Phineas and Ferb but there’s a good chance your kids have.

According to Disney - which is next month launching a film based on the cartoon - about a third of British kids have seen the TV show and follow the adventures of the duo, who strive to make every day of their 104-day summer holiday count. Show guest stars have included Jamie Oliver and David Beckham.

The brand has already expanded into books and toys, and a console game was launched last year.

The first feature-length film based on the series, Phineas and Ferb: Across the 2nd Dimension, which was shown on the Disney Channel last September, launches on DVD next month.