And Vogue wants to be part of this ... that had suffered cutbacks and challenges before moving on to Paris ahead of the Olympics for a sports and fashion hybrid party at the iconic Place Vendôme ...

The pictures of their engagement photoshoot were shared by Vogue Weddings on Instagram ... for Thomas from the sidelines during her Paris Olympics campaign, where she won three gold medals.

The three-time Olympic gold medalist is officially engaged to her longtime boyfriend, Spencer McManes, per an exclusive report from Vogue Weddings ... gold medals at the Paris Olympics, Spencer ...