“On a jet-ski. A non-moving jet-ski, but in the water," she said at the time.
She does not, however, reveal whether it was with her husband of three years, British director Tom Ackerley.
The pair began dating in 2014 after meeting on the set of Suite Française.
The duo reportedly tied the knot on December 18 in Byron Bay, with Margot wearing her mother's off-the-shoulder lace wedding gown.The Aussie native first burst onto our screens in Neighbours, before quickly making waves in Hollywood.
Her current flick, Once Upon A Time In Hollywood sees her star alongside Brad Pitt and Leonardo DiCaprio whilst taking on the role of the late American model, Sharon Tate.
WATCH: Brad Pitt, Leonardo DiCaprio and Margot Robbie walk the red carpet