David Walliams: 'Simon Cowell is a great boss' Having joined the Britain's Got Talent judging panel this year, David Walliams has praised Simon Cowell, saying he is "the best boss you can have in the world." Last night, Walliams won the Landmark Award at the National Television Awards in recognition of his huge swimming challenge, which he undertook for Sports Relief last year. The comedian revealed that what makes Cowell such a great person to work for is "he really likes you to take the mickey out of him." I didn't know if he would or not, because although I've met him over the years I couldn't say I knew him well, but actually from the first person who came out, we started teasing each other and it's been so much fun. It's a job. It doesn't feel like a job, it feels just like playing.