Wow — Rebecca Romijn and Jerry O’Connell‘s kids aren’t so little anymore! The actor, 43, took to Instagram on Thursday, Oct. 26 to share school pictures of their eight-year-old twin daughters, Dolly and Charlie — and we can’t get over how grown up the couple’s girls look!

“Most important day of the year,” the Stand by Me star captioned the photo. Fans were quick to comment on the sisters’ adorable pic. “Your daughters are beautiful!” one follower said. Another wrote, “One looks like Rebecca and the other one just like you. Such beautiful girls.?”

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Most important day of the year.

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Jerry and Rebecca welcomed Dolly Rebecca Rose and Charlie Tamara Tulip on Dec. 28, 2008. The couple — who married at their home in Calabasas, CA on July 14, 2007 — named Dolly after iconic country singer Dolly Parton and Charlie after Jerry’s younger brother, actor Charlie O’Connell.

Before tying the knot with Jerry, Rebecca was previously hitched to John Stamos — who is known for playing Uncle Jesse on Full House — from 1998 until 2005. In a recent interview, Jerry confessed his two daughters know their mom was once married to Uncle Jesse!

Full House is on a continual loop,” the actor said. “Because they expressed, like, real feelings for the character of Uncle Jesse, I said, ‘You know girls, I gotta tell you something. This is gonna be crazy… ‘” He continued, “My kids really want to know why mom isn’t still with him. [They say], ‘That was a mistake, mom.'” Too funny!

rebecca romijn family getty images

Rebecca, Jerry and their daughters in May 2011.

In a previous exclusive interview with Closer Weekly, Jerry joked about why he and Rebecca would never divorce. “We have a crazy household with our kids and our three dogs. Our house is so crazy that we just don’t want to get divorced right now because neither one of us wants to end up with our kids and our dogs,” Jerry quipped. “We realize it’s a team effort and there’s no way we can do it on our own right now!”

When asked if he and Rebecca would consider baby No. 3, he replied, “I don’t think that’s happening. That has to be a group decision. I will say this, our kids are eight and I would not mind having a baby around. When I see a little baby I really get that baby itch. They are so cute, but I just don’t see it happening.” For now, we’ll take more cute pics of Dolly and Charlie!

Click through the gallery below to see more celebs who have twins!