Party-hearty Prince Harry is heading to Amer­ica – and the royal family plans to hire round-the-clock bodyguards to keep him on the straight and narrow!

The fun-loving royal has made headlines with his wild antics, most recently jumping fully clothed into a pool at a Croatian nightspot and letting loose with pals at a London nightclub.

Now he’s set to spend 12 weeks in Arizona and California for military helicopter training, and sources say his grand­mother Queen Elizabeth is terrified his rowdy behavior will create a public relations nightmare.

“The Queen has been abso­lutely aghast at Harry’s drunken antics,” an insider close to the royal fami­ly told The ENQUIRER.

“When she heard about his 12 weeks of unsupervised freedom in America, she said, ‘This will never do!’

“Now the royal family plans to hire bodyguards 24 hours a day to trail Harry and keep him out of trouble. They’re afraid that once he gets to America, he will REALLY let loose!”

The redheaded rebel recently got in hot water for spurning a shooting party organized by his brother Prince William at the queen’s Sandringham Estate for his 27th birthday, sources say.

The estate was stocked with 250 pheasants, ducks and partridges for the shoot, but insiders say Harry preferred to hunt for “birds” of a different breed. He split for London and a riotous party at his buddy’s club Public, where he hit on hot chicks from British reality TV shows.

“And now Harry has served notice that he plans to head for Vegas on his down time from military training,” a source told The ENQUIRER.

"“When he gets to Sin City, Harry’s partying is likely to go off the charts! What’s more, the royals know there’s no way what happens in Vegas will stay in Vegas when it’s a prince partying like a wild man. 
“He’ll drive his bodyguards nuts, and Las Vegas will never be the same once Good Times Harry hits town!”