On Thursday, Alexander, 40, was arrested by the Ventura Sheriff’s Department prior to the Grammy Award winner’s planned nuptials to Sam Asghari.
Spears’ lawyer Mathew Rosengart now tells PEOPLE her restraining order against Alexander “was granted.” Rosengart adds that “he was charged with felony stalking and is incarcerated.”
“I extend my thanks to the Ventura County Sheriff’s Office and District Attorney’s Office for their good work and professionalism, and for the seriousness with which they are taking the matter,” Rosengart says.
TMZ was first to report the news.
Spears’ restraining order, which says Alexander can’t go within 100 yards of Spears, will last for three years, Fox News reports.
Alexander made a virtual appearance to his court hearing Monday and entered a not-guilty plea, the outlet added.
Along with the stalking felony, Alexander has been charged with misdemeanor counts of trespassing and refusing to leave private property, vandalism, and battery, per his booking form with the Ventura County Sheriff’s Office. His bail is set at $100,000.
He was also arrested on an out-of-county warrant for two felonies: grand theft embezzlement and receiving stolen property. The bail for those charges is $20,000.
During Thursday’s incident, Alexander went live on Instagram as he roamed around the property, revealing their wedding decorations, which were still being arranged by party planners. He could be heard yelling her name and claiming to security that he was invited to the wedding.
“So, here’s the inside scoop, guys, of the bull— wedding. Jason Alexander, what’s up,” he said, greeting the workers and even shaking one’s hand.
“My name’s Jason Alexander. Britney invited me here,” Alexander claimed. “Britney Spears invited me here. She’s my first wife, my only wife. I’m her first husband.”
RELATED VIDEO: Britney Spears and Sam Asghari are Married!
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Spears’ assistant Vicky T, who was alerted to the intrusion by fans on Instagram, later provided an update, assuring that the 40-year-old “Circus” singer was unharmed.
“I’ve done everything I can while being out of the country to keep everyone safe,” Vicky wrote on her Instagram Story. “Thank you to all the absolutely amazing and incredible fans for alerting me of so much. You are blessings. Thank you. Everyone is safe.”
Spears was married to Alexander, a childhood friend, for 55 hours in January 2004, after the pair eloped at the Little White Wedding Chapel in Las Vegas.
Alexander previously pleaded guilty in January to violating an order of protection and aggravated stalking against an unidentified woman, TMZ reported at the time. He was given 11 months and 29 days of probation.
“Britney walked herself down the aisle. She looked absolutely stunning in her main dress,” a source told PEOPLE. “She cried happy tears at some moments.”
The insider added: “It ended up being the happiest night for Britney. She wanted a fairytale wedding and she got it. Britney looked stunning. She is very excited to be married. She looks forward to a future with Sam.”