Simon Cowell tells 'X Factor' musical double to be a 'd*** every night'

Simon Cowell has told the actor, who plays him in The 'X Factor' musical, to be a d*** every night.

Speaking to The Sunday Times Culture supplement, the 54-year-old, who recently welcomed his first child with girlfriend Lauren Silverman, said he has told Nigel Harman to play up to his trademark nasty persona while on stage, the Daily Star reported.

The musical, I Can't Sing!, has been penned by TV Burp's Harry Hill.