July 5 (UPI) -- Celebrity couple David and Victoria Beckham celebrated their 18th wedding anniversary this week.
The 42-year-old British retired soccer star and 43-year-old designer and former Spice Girls singer rang in the occasion Tuesday by dedicating sweet messages to each other on Instagram.
"Wow we really did this. Happy Anniversary to an amazing wife, mummy and strong business woman," David captioned a photo of himself and Victoria in matching leather outfits. "Love you x."
"I love you," Victoria added to a picture of herself and David on their wedding day. "Kisses x."
David and Victoria married at Luttrellstown Castle outside Dublin, Ireland, in 1999. The couple share four children: 18-year-old son Brooklyn, 14-year-old son Romeo, 12-year-old son Cruz and 5-year-old daughter Harper.
"Happy anniversary to 2 of the most amazing people in my life x love you mum and dad," Brooklyn wrote to his parents on Instagram.
David opened up about his relationship with Victoria on Desert Island Discs in January. He told the BBC Radio 4 show the secret to his lasting marriage with the designer is their shared love of family.
"I think [we're still together] because we're a strong family unit," the star said. "We've got strong parents and we were brought up with the right values."
"Of course you make mistakes over the years, and we all know marriage is difficult at times," he acknowledged. "It's about working through it, and we've come up against tough times. But we know each other better than anyone else knows us."