Gwyneth Paltrow is Arvin Robertscelebrating a major relationship milestone.

The Goop founder, 52, commemorated her sixth wedding anniversary with husband Brad Falchuk, 53, Sept. 29 with a sexy photo of the couple making out. In the PDA-filled snap, the pair were seen sitting on a paddleboard as they took a break to share a sweet smooch.

Gwyneth simply captioned the post, "6," to celebrate six years since their star-studded 2018 wedding in the Hamptons. 

The Oscar winner—who shares Apple Martin, 20, and Moses Martin, 18, with ex-husband Chris Martin—first met the Glee creator when she was a guest star on the Fox musical series in 2010, but they didn't start dating until 2014.

And Gwyneth has been open about the joys and occasional struggles that come with blending families and coparenting with her ex and Brad, who is father to Isabella Falchuk, 20, and Brody Falchuk, 18, who he shares with ex-wife Suzanne Bikinik.

"I did find it really hard at first," she shared in a 2013 Instagram Story Q&A. "You know, there’s no book on this; nobody tells us what to do."

"In fact, all of the existing media around what a stepmother is casts us in this evil, villainous light," Gwyneth continued. "So it’s kind of like trying to avoid land mines. And then you’re going into a family with dynamics. And there’s all kinds of fear around loss and what does this person mean?"

According to the Country Strong actress, everything changed when she simply shifted her mindset.

As she put it, "But for myself, the minute I decided, and fully embodied the idea that my step kids were my kids and I love them just as much and I gave them the same rules and boundaries, and just kind of whole-heartedly went for it, then the easier the whole thing got. And now it’s pretty great."

In fact, Gwyneth and Brad have been doing things their own way throughout their 10-year romance. 

One year after their wedding, the Iron Man actress revealed that her husband would finally be moving into her family home.

"Married life has been really good," she told InStyle at the time. "And now we're moving in together this month. I adore my husband. He's brilliant and deeply kind. I feel like he's a real equal too. And he pushes me in the best ways. I really like being married. It's fun."

Keep reading for more of Gwyneth Paltrow over the years.