Radio personality Howard Stern is in serious negotiations with NBC to become a judge on the network's reality competition show "America's Got Talent," according to people close to the situation.

Under the deal being discussed, Mr. Stern would earn about $15 million a year to join Howie Mandel and Sharon Osbourne on the judge's table. "America's Got Talent" is among the most popular shows on television during the summer, when it typically airs, drawing as many as 14 million viewers. Mr. Stern could not be reached for comment...