Raging MARY TYLER MOORE’s calling all her friends, begging them to boycott “America’s Got Talent” because it stars new judge HOWARD STERN, who told the world her ex-husband/good pal GRANT TINKER’s dead – even though he’s very much alive at age 86!

On “Late Night with JIMMY FALLON,” Stern gloated over his triumphal return to NBC after being fired in 1985 – and told by then-network chairman Tinker he’d “never work at this network again… over my dead body!”

Quipped Howard: “I think he has a dead body now, doesn’t he?…Sorry, Grant – yeah, he actually died!”

Said an insider: “Mary was shocked at Howard’s inaccuracy – and livid over his insensitivity in slamming a man she still cares for.

She’s calling friends to boycott ‘AGT’ – and asking them to call their friends!”

NOTE TO MTM: It was a mistake, not a murder. Chill!