Happy birthday, Keely Shaye Brosnan!
"Happy Birthday my darling @KeelyShayeBrosnan," Pierce, 69, wrote alongside a tropical photo of the pair.
"I love you dearly. So many years of love, life, work and play," he added. "Onwards we go!"
"Happy Birthday 'nutty Keely' the sweetest ever!" wrote Wilson, 65, as Crawford, 56, said, "Happy birthday beautiful, soulful @keelyshayebrosnan ! 🌸."
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Pierce and Keely tied the knot in Ireland in August 2001. They share two sons together: Dylan, 25, and Paris, 21.
Back in 2016, Pierce gushed over his wife, telling the Independent in March of that year, "I love her vitality, her passion. She has this strength that I wouldn't be able to live without. When Keely looks at me, I go weak."
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"My wife and I took a short road trip up to Santa Barbara — we were going for a romantic weekend and to look at houses and drink great wine," he said at the time. "We didn't listen to any music, but we just listened to the sounds of each other's voices and sorted out the world."
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Last September, Pierce shared a snapshot of his longtime love in a swimsuit on Instagram to celebrate her 58th birthday.
"My beautiful luscious love Keely on her 58th trip around the sun yesterday," Pierce captioned the post. "Apres swim, making coconut water.💥❤️💥❤️💥 Happiest of birthdays it was!"