Grecko, 28, has shared a series of photos with Edelsten, 74, where she wrote, "Spending Christmas with my husband ☺️☺️☺️ GLittA FoXX and Geoffrey Edelsten fo Eva".
When asked if they were back together, Grecko stated in the comments section "yea we r".
She also revealed he was traveling to New York to be with her: "he’s coming to Newyork!!!"
In one of the images the former couple are holding hands over dinner, with Grecko's diamond engagement ring on full display.
The businessman and Grecko tied the knot after Edelsten proposed in the Birdcage at Flemington on Melbourne Cup day in 2014.
However, their marriage ended just five months later and she returned to New York.
In the month following their engagement, Grecko appeared in the Melbourne Magistrates’ Court after walking up Bourke Street naked.