Guy Pearce and his wife, Kate Mestitz, have sadly called it quits.

The Iron Man star, 48, confirmed the news of their divorce after 18 years of marriage via Twitter on Monday, Oct. 12. “Rumours r true I’m afraid – Kate and I parted ways back in Jan. Sorry 2 be boring but we couldn’t be closer. We’ll love each other 4 ever xx,” he wrote.

In a subsequent tweet, Guy posted a picture of Kate with the caption, “The best 20+ years of my life – with this beautiful lady…”

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The couple — who were childhood sweethearts — previously married in March 1997. “Kate and I will always love and support one another and be the best of friends,” the actor said of his wife, who works as a psychologist, in a statement to the Daily Mail Australia earlier this week.

guy pearce and kate mestitz

Guy and Kate in April 2013.

“No-one knows me like Kate does, and we’ll forever be appreciative of our mutual respect. We’ve both grown enormously through our relationship, but sadly, the time has come to part ways,” he added.