Howard Stern is reportedly in "serious negotiations" with NBC about being a judge on 'America's Got Talent'.

The radio host is thought to be discussing the possibility of replacing former panellist Piers Morgan on the panel - which features Sharon Osbourne and Howie Mandel - and he could earn up to $15 million a year for the role, according to the Wall Street Journal.

The 57-year-old Sirus XM Radio presenter has previously said the judges - who were Simon Cowell, Randy Jackson, Ellen Degeneres and Kara DioGuardi at the time - "barely have an opinion".

Last year, he said: "Judging is an interesting thing. What I do for a living is a lot more complicated than judging. I have to wake up people. I compete in radio markets and to sit there and judge a karaoke contest, the one criteria would be to have an opinion.

"It seems that two or three of the judges barely have an opinion."