"Gorgeous fam and gorgeous people," O'Connell captioned the post.
Stamos, 62, and Romijn, 53, filed court papers in Los Angeles to end their five-year marriage in August 2004 -- and while the split seemed to be amicable at the time, a bit of drama surfaced years later.
In October 2023, Stamos opened up about the downfall of his and the X-Men actress' marriage ahead of the release of his memoir, If You Would Have Told Me.
"My first marriage was shattering to me. I was shattered for way too long, too," he told PEOPLE at the time. "I mean, a year, okay, good. But it went on [for] years and years."
Throughout the process of reliving the memories so he could document them on the page, Stamos admitted that reflecting on how he had felt at the time of their highly publicized split was "really difficult."
"In my mind back then, she was the Devil, and I just hated her. I couldn't believe how much I hated her, and it ruined my life,"
the Big Shot star continued, going on to explain that back then, "one of the steps in AA, the fourth step, is you lay out all your grievances, everything that people did to you. And then I said, 'Oh, she did this, she did that, blah blah blah.' And then my sponsor goes, 'Now what part did you play in that?' And I go, like, 'None.' "
Before long, however, Stamos came to realize that he wasn't completely blameless when it came to the breakdown of his and Romijn's relationship.
"You start thinking, it's like, 'Oh, she wasn't the Devil. Maybe I was as much to blame as her,' "
he explained. “It was very public, and that was very painful. I didn’t write much about that, but it’s hard.”
For her part, Romijn shared on The Talk in 2022 that there was a lot she missed about her marriage with Stamos.
"Going through a divorce is terrible, it's awful,"
Romijn explained in a joint interview with O'Connell. "I was with him [Stamos] for 10 years. Divorce feels like a failure ... and there were a lot of things that I had to let go of that were very sad."
"I have a lot of really fun memories,"
she added. “I have a lot of fond memories of him. A lot of things about him that I miss. But yeah, it’s tricky. It’s a very hard decision to come to when you decide to end a marriage. It was heartbreaking.”
But once she got wind of Stamos’ perspective that he outlined in his memoir, Romijn revealed that she felt a bit “blindsided.”
“I don’t really want to help him sell his books based on those headlines,”
she told Entertainment Tonight in January 2024. “So that’s all I really want to say about it.”
Romijn met her now-husband O'Connell at the Maxim Hot 100 bash in 2004, and they married in 2007.
“I met my wife and her ex John Stamos at a party when they were married,”
O'Connell recalled to PEOPLE in 2017. “I remember thinking, ‘Wow, this girl is really beautiful and funny.’ I talked to her the whole party. We clicked. We clicked the first time we met. Obviously, she was married, and I know shenanigans go on, but no shenanigans happened. But we clicked. Day one, we clicked.”