Rudd enjoys working with buds

Paul Rudd makes so many Judd Apatow movies because he often doesn't get the other parts he wants.

The 42-year-old actor – who has worked with the producer and director on a number of movies including 'Knocked Up', 'The 40 Year Old Virgin' and 'This Is 40' - feels comfortable with the filmmaker though he admits that isn't the only reason why they collaborate so frequently.