Margot Robbie LEAD
Credit: George Pimentel/WireImage

Margot Robbie definitely had something old and something new on her wedding day.

Many might have expected that the Suicide Squad star—who married her longtime boyfriend Tom Ackerley over the weekend—would wear a custom designer gown for her nuptials, but the 26-year-old Aussie native opted for something much more sentimental. Robbie wowed in an off-the-shoulder lace gown on her big day that her mother Sarie Kessler wore for her own wedding some 30 years ago, The Courier-Mail reports.

However, the actress did have the vintage creation altered by Australian designer Casey Tanswell last week. "[Tanswell] had been approached by a friend to do the alterations," a source told the outlet. "She didn't know it was Margot until she turned up at her home for the fitting."

The private and intimate ceremony took place at a picturesque venue in Coorabell, a small town located in Australia’s Byron Bay.

VIDEO: Margot Robbie Debuts Her Stunning Engagement Ring

And while the couple has stayed fairly quiet about their wedding, Robbie more or less confirmed the news earlier this week when she posted a photo of her and her new husband kissing while she put her dazzling diamond ring on display in the foreground.

Simply stunning.