Rob Lowe showers love on wife Sheryl Berkoff on 32nd wedding anniversary

Rob Lowe paid tribute to his wife Sheryl Berkoff as the pair marked their 32nd wedding anniversary on Saturday.

Taking to Instagram, the 59-year-old actor heaped praise for Berkoff, alongside a selfie of the actress outdoors.

"Today marks 32 years married to this beautiful, inspiring, nurturing, strong, industrious, sexy, and wonderfully unique woman," Lowe gushed.

"I am SO grateful for the day she said she’d join me on our amazing life journey together. Happy Anniversary, Baby!!" he added.

Lowe and Berkoff have been married since 1991. Together, they are parents to two sons: Matthew Edward Lowe, 30, and John Owen Lowe, 28.

The Youngblood actor dished on his secret to making his decades-long marriage work.

Speaking to host Bruce Bozzi on the iHeartPodcast Table for Two with Bruce Bozzi, Lowe acknowledged that marriage is hard, however, being best friends with your partner certainly helps.

"[Marriage] is hard anywhere, it is not just Hollywood – it's everywhere," the actor shared. "Sheryl was and is my best friend. So if you marry for anything other than the fact that is your best friend, you're at a disadvantage from the jump, because that will sustain when the other stuff ebbs and flows."

He continued: "People say marriage takes work. I'm not sure if it takes work, but what it does take is forgiveness, and being really cognizant of what hill you're willing to die on."

"I do believe you need the heat for sure," he explained. "If you don't have the heat – and that's a chemical thing – I mean I still have it with Sheryl, you gotta keep the heat."