'Might set him off!' Rudy Giuliani regrets birthday message he left for Trump

Among the birthday wishes Donald Trump received to celebrate turning 78, there's one that former New York City Mayor Rudy Giuliani hopes he never hears.

His own.

“We called him and left a message for him. And I hope he doesn’t listen to it ‘cause we sang happy birthday, this could set him off," Giuliani expressed late Friday during “The Rudy Giuliani Show,” according to The Daily Beast.

That penitent statement by Trump's former personal attorney was followed by swelling fears that the rendition of the traditional song might shrivel the birthday boy's spirits.

ALSO READ: Republicans weaponizing ignorance is a dangerous game

“He likes [opera singer Luciano] Pavarotti, so this could set him off… in a whole new direction," Giuliani added. "Who knows, it could put him in a bad mood.”

The Trump chum speculated that the recently convicted former president “seems to be in such a good mood lately” and that “things are very much going his way.”

However, Giuliani, who said "god willing" Trump will become the 47th president come Nov. 5, appeared to shift to taking a shot at President Joe Biden, who he claimed is hellbent “to take your kid away” and change their gender.

At a Las Vegas rally last week, Trump appeared to cringe about turning another year older.

"There's a certain point at which you don't want to hear 'Happy Birthday.' You just want to pretend the day doesn't exist," he told supporters before breaking into an impromptu song.

A soiree was being held Friday night in West Palm Beach to ring in Trump's special day with members of his "Club 47" fan group.

On Thursday, Republicans gifted Trump a cake bearing the numbers "45" and "47" as welcomed him back to Washington D.C.