Lori Loughlin and Mossimo Giannulli spent more than a year legally married while living separate lives. Loughlin has now taken the formal step toward ending their nearly three-decade marriage.
The Full House actress filed for divorce Sept. 4 in Los Angeles Superior Court after 28 years of marriage, according to court documents obtained by ABC News. She cited irreconcilable differences.
The paperwork also settles a timeline that had previously been less precise. Loughlin lists Aug. 31, 2025 as the couple’s date of separation, more than a month before her representative publicly confirmed in October that she and Giannulli were living apart and “taking a break from their marriage.”
Loughlin, 62, and Giannulli, 63, married Nov. 27, 1997 and share two adult daughters, Isabella Rose, 27, and Olivia Jade, 26. Because both daughters are adults, the divorce filing does not involve child custody or child-support requests.
The Filing Reveals Their Prenup Was Amended in 2015
Loughlin and Giannulli signed a premarital agreement on Oct. 28, 1997, approximately one month before they married. The new divorce filing reveals that the agreement was later amended on Aug. 11, 2015.
Loughlin is asking the court to divide the couple’s property, assets and debts according to the terms of those agreements. The filing reserves the question of spousal support for later determination and also addresses how attorney fees and costs should be allocated between the two sides.
The timing of the amendment predates the college admissions scandal that would later put both spouses under intense legal and public scrutiny. Loughlin and Giannulli pleaded guilty to federal conspiracy charges in 2020 after prosecutors accused them of paying $500,000 to have their daughters falsely presented as USC crew recruits. Loughlin served two months in prison, while Giannulli received a five-month sentence.
Entertainment Weekly also obtained the divorce paperwork and confirmed that irreconcilable differences are the legal basis listed for dissolving the marriage.
They Had Already Been Separated for More Than a Year
The public first learned that Loughlin and Giannulli’s marriage was in trouble on Oct. 2, 2025. At the time, her representative Elizabeth Much said they were “living apart and taking a break from their marriage” and emphasized that there were no legal proceedings underway.
The divorce petition now places the actual separation considerably earlier, on Aug. 31. By the time their breakup became public, they had therefore already been separated for about a month. E! News reported that neither Loughlin nor Giannulli has personally offered a detailed public account of why the marriage ended.
Her Instagram Return Fell Exactly One Year After the Separation Date
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Loughlin returned to Instagram on Aug. 31, 2026 after approximately seven years away from the platform. For the comeback video, Loughlin leaned into her Full House history.
John Stamos, Jodie Sweetin, Candace Cameron Bure, Scott Weinger, Andrea Barber and Dave Coulier appeared holding cups of coffee and repeating the “Wake Up, San Francisco” line associated with Aunt Becky’s television career.
Loughlin then appeared as Rebecca Donaldson and welcomed herself back to the show. She captioned the post, “Wake up, San Francisco! I’m back on IG.”
She Posted ‘Here’s to Things Working Out’ After Filing
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Another personal post followed on Sept. 7, three days after the divorce petition was filed and one day before news of it became public.
The video collected recent moments from Loughlin’s life, including clips of her laughing, spending time with friends, playing piano and celebrating her birthday. She captioned it, “Here’s to things working out.”