Kerr was previously married to Orlando Bloom, with whom she shares a 6-year-old son, Flynn. She met Spiegel met in 2014 and got engaged last year.
In January, ET caught up with Kerr on the set of her Super Bowl commercial alongside NFL player Cam Newton, and while she didn't get too detailed about the upcoming nuptials, the Aussie beauty noted that wedding plans were "coming along nicely."
"That's about all I can say," she added with a laugh. "It's very exciting."
Kerr and 27-year-old Spiegel tied the knot during an intimate ceremony in Los Angeles, California, last month.