During her years in college, Marie worked for Estée Lauder, as assistant to the public relations manager in 1994, and as an assistant to the managing director of ING Numismatic Group SA in Geneva.
After graduating, she started working for Double Click Inc, an international advertising agency, in New York as international marketing coordinator.
The Princess' third official trip was to Hong Kong and China together with Prince Joachim in November 2009.
Marie increasingly made weekend visits from Geneva to Denmark in 2007.
On 3 October 2007, it was officially announced that Marie Cavallier was engaged to Prince Joachim.
The first wedding took place on in Møgeltønder Church.
Upon her marriage to Joachim, Marie's title is "Her Royal Highness Princess Marie of Denmark, Countess of Monpezat".