Breaking:Mark Wahlberg and Wife Rhea Durham Celebrate 15 Years of Marriage with Romantic Photos

Mark Wahlberg and Rhea Durham are marking a marriage milestone.

The actor, 53, and his wife, 46, celebrated 15 years of marriage on Aug. 1 with a pair of Instagram posts. Durham uploaded a series of selfies of her and her husband — along with a few snapshots of Wahlberg showing off his muscles at the beach — to celebrate their relationship.

“Happy Anniversary my Love. I love you to infinity and beyond and back again and again,” she wrote in a caption to her post. “Happy anniversary,” Wahlberg wrote in a caption to his post, along with a throwback photo of the pair.

Durham even opened up to a follower who asked her in a comment under her Instagram post what helps keep the pair’s marriage strong, responding, “God.”

Wahlberg and Durham married at Good Shepherd Catholic Church in Beverly Hills in 2009, eight years after they initially met in New York City in 2001. The couple share four kids: Ella, 20, Michael, 18, Brendan, 15, and Grace, 14.

The Departed actor last took an opportunity to share his gratitude for Durham and their marriage when she turned 46 on July 1; he shared a snapshot from the family’s celebratory dinner on Instagram at the time and wrote in a caption, “HAPPY B DAY BABE.”

On the flip side, Durham marked Wahlberg’s own birthday on June 5, when she shared a collage of photos of her actor husband and their children over the years to the social media platform. “Happy Birthday to the husband and daddy of our dreams. We LOVE you infinity,” she wrote.

Wahlberg has been busy in recent months; he most recently appeared on the big screen in Arthur the King, and he has two upcoming movies set to release this year, including Netflix’s The Union with Halle Berry.

Back in June, the actor told PEOPLE he surprised Durham with his decision to partially shave his head for his role in the upcoming movie Flight Risk, which lands in theaters Oct. 17.