Don’t worry darling, the grooms didn’t mind. 

Olivia Wilde broke the cardinal rule of dressing for a wedding when she attended Colton Underwood and Jordan C. Brown’s nuptials over the weekend.

The “Booksmart” director, 39, wore a silky, slinky white Nili Lotan gown ($1,895) to the couple’s marriage, and boldly showed off the very bridal style on her Instagram Story — along with an explanation.

“Wore a wedding dress to a wedding so I could make a joke about it in my toast,” Wilde wrote on top of a picture of herself in the backless design.

“The grooms approved,” she added.

The unconventional style choice still caused a stir on social media, with one person tweeting, “Olivia Wilde showing up to her friend’s wedding in a white silk wedding gown is… desperate.”

This isn’t Wilde’s only near-fashion faux pas this month.

Earlier this May, the “Don’t Worry Darling” director hit the 2023 Met Gala red carpet in a white Chloé dress that was strikingly similar to a black version worn by Vogue China’s editor-in-chief, Margaret Zhang, at the same event.

But Wilde took the matching moment in stride.

“Great minds ????,” she captioned side-by-side shots of the pair on her Instagram Story. “If you’re gonna twin with anyone, make it @margaretzhang.”

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Underwood, 31, married Brown at the Carneros Resort and Spa in California during a lavish three-day affair with 200 guests.

The couple were first spotted together in September 2021 at the Four Seasons resort in Maui, Hawaii. 

They announced their engagement in February 2022. 

Underwood (who starred on the “Bachelor” in 2019 during Season 23) came out as gay in April 2021 on “Good Morning America.” 

Underwood previously dated his “Bachelor” winner, Cassie Randolph, until they broke up in April 2020.

Randolph was granted a restraining order against Underwood in September 2020 for allegedly stalking and harassing her before dropping the case two months later.