Jason Alexander, 40, was convicted of aggravated trespassing and battery Thursday.
Alexander showed up uninvited to Spears' Thousand Oaks home before her wedding ceremony to Sam Asghari.
He was sentenced to 64 days in jail, which he has already served.
Britney Spears' ex-husband Jason Alexander was convicted Thursday in a California court of aggravated trespassing and battery two months after storming the pop star's wedding to Sam Asghari, according to The Associated Press.
Alexander, 40, pleaded no contest to the two misdemeanor counts and was sentenced to 64 days that he has already served, the outlet reports. Prosecutors dropped charges of felony stalking and misdemeanor vandalism, according to the AP.
Lawyers for Spears and Alexander did not immediately respond to Insider's request for comment.
Spears and Alexander were once childhood friends and were married for less than three days in 2004. After 55 hours, the marriage was annulled.
On June 9, during Spears and Asghari 's ceremony, Alexander showed up uninvited to her home in Thousand Oaks, California, where the wedding took place. Spears and Asghari have been together since 2016 after meeting on the set of her music video for "Slumber Party."
Alexander livestreamed the whole ordeal on Instagram, and at one point can be heard saying, "Britney Spears invited me here. She's my first wife, my only wife … I'm here to crash the wedding."
According to the AP, testimony at the preliminary hearing stated that Alexander made his way inside the house and up to Spears' bedroom where she was getting ready for the ceremony.
The AP notes prosecutors included that Alexander damaged property, refused to leave when asked, and battered a security guard who tried to remove him. A judge issued a protective order that forbids him from coming within 100 yards of Spears or the security guard, the AP reported.
Spears and Asghari had already secured a restraining order against Alexander following the events that took place before their wedding ceremony, according to Insider's Taiyler Simone Mitchell and Azmi Haroun.
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