Piers Morgan, Howie Mandel React to Howard Stern's 'America's Got Talent' Announcement

The Twitterverse is abuzz with reactions to Howard Stern's new gig as a judge on NBC's America's Got Talent.

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Howard Stern Joins NBC's 'America's Got Talent'

Piers Morgan, 'America's Got Talent' Co-Stars Tweet Farewell Wishes; Mutual Admiration

Piers Morgan, who recently resigned from the reality contest's judging panel to focus on his CNN program Piers Morgan Tonight, responded to Tuesday morning's announcement on Twitter, posting: "Congrats to @HowardStern on landing my #AmericasGotTalent judging gig - he'll be outrageous, hilarious, dangerous & brilliant. Can't wait."

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Judge Howie Mandel, meanwhile, said he "couldn't be happier," and predicted the upcoming season "will be our best year yet." In response to a question from a reader named @AurorasGranny wondering who Stern was replacing, Mandel responded: "Betty White." He replied "I think u will" to an anti-Stern tweet from @juliedonovan73: "I don't think I'll be watching him on the show."

Bravo executive Andy Cohen also weighed in on the social-networking site: "Psyched that @HowardStern is joining the nbc family. #OMG." The Real Housewives-packed cable channel is part of Comcast-controlled NBCUniversal.

Carson Daly, host of NBC's Last Call with Carson Daly, echoed that sentiment. "So stoked - welcome to the NBC family!"

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In another congratulatory tweet, TMZ creator Harvey Levin remarked: "I've been saying this for months ..Howard Stern will make AGT huge hit..and those who object are dumb. He knows when to push it and when not."

Lewis Kay, a publicist at the public-relations firm PMK/BNC, commented on the timing: "Pretty funny that Howard Stern chose the exact moment Globes were being announced to reveal his AGT news."

STORY: Piers Morgan, 'America's Got Talent' Co-Stars Tweet Farewell Wishes; Mutual Admiration

At least one reader on the site thinks Stern's New York-based Sirius program will suffer as a result of his second, L.A.-based job. "Howard Stern's radio show is going to suffer now that he's been hired to host 'America's Got Talent' next season. It already has," complained @michaelcorcoran.