Watch: Britney Spears’ ex-husband Jason Alexander crashes her wedding

Watch: Britney Spears’ ex-husband Jason Alexander crashes her wedding

Someone called the police! Britney's ex from 18 years ago was arrested after trespassing at her wedding. 

Britney Spears and Sam Asghari
Britney Spears and her partner Sam Asghari/ Instagram (@britneyspears)

Britney Spears’ wedding day was almost ruined this week when her ex-husband Jason Alexander barged into her wedding venue. 

He made it past several security members before getting inside the 'Oops I Did It Again' singer's Los Angeles mansion. "Where's Britney at?" he asked as he opened the doors inside the home.

Jason then walked outside where a tent had been pitched for the wedding. 

"I'm Jason Alexander - first husband. I'm here to crash the wedding," he told one person on the premises. 

Jason recorded the incident on Instagram Live for his 9,000 followers to see - though less than 200 appeared to tune in. 

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Jason revealed that he had been visiting a path near Britney's home for three weeks before jumping the fence on her wedding day. 

Britney and Jason were married for 55 hours in 2004. The pair, who were childhood friends, got hitched in a quickie Las Vegas ceremony. 

But it was annulled after Britney's family got wind of what happened. Jason told the Daily Mail last year that they did not want to end the union. 

"The men in black swooped in, along with her mum and other family members, and they made us sign paperwork under duress to end our marriage. We didn’t want to annul it. They lied to us. It was always about controlling Britney and controlling her money," he alleged. 

Nearly 20 years later and Jason can't get Britney out of his mind.

We're not sure what he intended to do at the wedding. Thankfully, there was nobody in the wedding ceremony tent other than a few workers. 

He was later thrown off the premises and arrested. 

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Despite the disruption, Britney's big day went ahead as planned. Guests, including Paris Hilton, Madonna, Selana Gomez, Drew Barrymore, and Donatella Versace - who designed her wedding dress, watched her marry her longtime partner Sam Asghari.

According to People, only 60 people were in attendance. Britney walked down the aisle to 'Can't Help Falling in Love' by Elvis Presley. 

Sam's manager, Brandon Cohen, told the publication: "I am very ecstatic this day has come, and they are married. I know he wanted this for so long. He is so caring and supportive every step of the way." 

Britney was previously married to dancer Kevin Federline. The 40-year-old has children, Sean and Jayden, with him.

Take a look at some of the pictures from the wedding. 

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