According to RSC associate director Gregory Doran, he was born to play it. "I’ve known Richard Wilson for 23 years and for most of that time I’ve been trying to persuade him to play Malvolio ... As Richard puts it, Malvolio is a grumpy old bugger." Wilson himself appears to be slightly nonplussed as to how he comes to be making his Shakespeare debut with the RSC at the age of 73.
Full Article at Birmingham Post