The 42-year-old comedian is considered to be the real star of the current series and he is apparently being offered 1million pound for another two years on the show, reported Daily Mirror.
Walliams joined BGT two years ago and has grown into his role, becoming a favourite with viewers, who love to see him poke fun at boss Simon Cowell, 54.
"David is in very early stage discussions. His current contract expires at the end of this series and show bosses are hoping to coax him back. The producers recognise just how important he is for ratings and they're very keen for him to sign up again," a source said.