Margot Robbie married her longtime boyfriend Tom Ackerley in a secret wedding in Byron Bay last weekend.

And it’s been revealed the stunning Australian actress, 26, wore her mother’s 30-year-old gown on her special day.

A source told The Courier Mail the dress was altered by Gold Coast designer Casey Tanswell last week.

In the family! The stunning Australian actress, 26, wore her mother’s 30-year-old gown on her special day

‘(Tanswell) had been approached by a friend to do the alterations,’ the source told the publication.

Pictured on the day, Margot was seen wearing the boho-inspired gown, which boasted floaty sleeves and fell loosely over her slender frame.

Mumma’s girl! Margot pictured with her mother Sarie Kessler

Revealed: The dress was altered by Gold Coast designer Casey Tanswell last week. Above, Margot embraces her beau on the dance floor

With her blonde hair curled around her face, she looked every inch the dazzling bride as she chatted to her young nephew.

On Tuesday afternoon, Margot took to Instagram to flaunt her diamond ring and rose gold wedding band in a cheeky Instagram snap.

She was seen sticking up her ring finger to the camera while kissing her beau in the background.

Love at first sight: Margot and Tom met in 2013 on set of World War II drama Suite Française in France. Above, the pair are pictured at the Arizona Coyotes vs New York Rangers NHL match in New York in 2014

Jewellers who spoke to Daily Mail Australia estimated the gold ring to cost between $20,000 to $30,000, with a 1.5 carat pear-shaped diamond at its centre.

On Monday, Woman’s Day reported that Tom wanted to get married in his native UK, but gave up his dream for his lady, who has always wanted to say ‘I do’ Down Under.

The magazine also claimed that the pair wrote their own vows for the ceremony.

Margot and Tom met in 2013 on set of World War II drama Suite Française in France.

Decisions: According to Woman’s Day on Monday, Tom wished to get married in his native UK, but gave up his dream for his ladylove, who has always wanted to say ‘I do’ Down Under