Diane von Furstenberg and Barry Diller have reached their golden anniversary.

The fashion designer celebrated 50 years since she and her husband fell in love via Instagram over the weekend.

“Today is the 50th anniversary of the BIG BANG !!! The day Barry and I fell in love !” the 78-year-old captioned throwback photos on Saturday with the billionaire businessman, who came out as gay earlier this year.

“He opened the door of his heart and never closed it !” she continued. “The first day of a long, colorful, happy journey …. UNCONDITIONAL LOVE ❤️❤️❤️ thank you BD ❤️👍🙏.”

The social media slideshow kicked off with a photo of the couple riding a motorcycle in all-white ensembles, with the “House of DVF” alum kissing her partner’s back.

Subsequent shots showed them cuddling up on couc

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