Prince Harry's 'Marriage Crisis' Fears as He's 'Heading on 40th Birthday Lads' Holiday Without Meghan': 'He Better Not Be Thinking About Going to Vegas!'

Prince Harry's 40th birthday plans are sparking fears his marriage to Meghan Markle might be in crisis.

RadarOnline.com can reveal the Duke of Sussex, who is set to turn 40 on September 15, will mark the milestone by taking a trip with his best friends – including former hellraisers he used to drink with in Britain — and allegedly without the former actress.

Sources have joked he "better not" be planning to host the bash in Las Vegas as it would be a "PR nightmare" and rake up memories of his wild antics in Sin City.

In 2012, naked photos of the partying prince being hugged by a barely-clothed woman were posted online.

The photos embarrassed the royal family and questions about how the pictures were taken created serious security concerns.

An insider said: "This is another sign Harry's marriage is seriously strained.

"Meghan knows all about his Vegas scandal, and she's never been one for wild parties or letting her men off the leash."

The source continued: "Harry is playing with fire here, and he better not be even thinking of going back to Vegas for this blow-out.

"He's desperate to get back to the UK because that's where all the old pals he abandoned live, and this party is another sign he's just really lost and homesick and trying to get his old life back."

Another insider told The Sun Harry sees the trip as a way of "reconnecting" with old friends from the UK.

The source said: "Harry is feeling more and more isolated in California, which is why he has been reconnecting with old friends back home."

Some of those friends could reportedly include famous faces like James Corden , Orlando Bloom , Chris Martin and Nacho Figueras.

But other insiders dismissed the Las Vegas rumors and claimed Harry is choosing to hit a more timid location for his 40th birthday getaway – California's Montecito Peak.

A source said: "The Cold Spring Trail has lots of streams and pools which people regularly take a dip in. But there are also lots of snakes and other wildlife to contend with, like large cats."

While he reportedly plans on jetting off with friends, Markle, 43, will remain behind with the royal renegades' son Archie , five, and daughter Lilibet , three.

Harry even emailed People to reveal the joy he receives from his kids ahead of his milestone birthday.

The duke wrote: "'The best gift I've ever been given is, without a doubt, my kids. I enjoy watching them grow every single day, and I love being their dad."

Harry will also allegedly celebrate his 40th birthday with a low-key party at home with family before the rumored weekend away.

As RadarOnline.com reported, the prince also allegedly plans to leave his wife at home when he hits New York City later this month.

While in the Big Apple, Harry apparently plans to "advance a number of his patronages and philanthropic initiatives".

His 40th birthday will be celebrated in stark contrast to his 30th – which was spent with his estranged brother Prince William and sister-in-law Kate Middleton , both 42.

At the time, William threw a black-tie party for his ­little brother at Clarence House.

Thirty of his best friends toasted Harry with cases of ­Highgrove champagne sent by his father, then-Prince Charles , 75.

But following Harry and Meghan's decision to step away from royal duties and flee from the UK to the US in January 2020, the two brothers have barely spoken.

Their rift was exacerbated by the publication of Harry's memoir Spare , in which he leveled brazen accusations against his family.

Harry claimed William branded his wife "difficult", "rude" and "abrasive" in the tell-all tome.

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