The Grand Ducal Court of Luxembourg announced on 5 April 2019 that the divorce between Prince Louis and Princess Tessy became final the day before, 4 April 2019.
The divorce was covered by the local press, among others Wort.lu, following the statement and has also been written about in other blogs, like Marlene Koenig's (go also here) and Luxarazzi (see also a follow-up). But «for the record» I mention it also in my own blog.
Prince Louis married Tessy Antony in 2006. The decision to get a divorce was made public in January 2017, and a decree nisi was granted om 17 February 2017. Since then the former couple has been in a conflict over the financial settlement, which now is solved.
According to the press statement referred to above, Tessy has as a result of the divorce ceased to be a Princess of Luxembourg with the style Royal Highness, and she will not represent the Grand Ducal family anylonger. It's been a while, anyway. For the sake of the children, Prince Gabriel and Prince Noah of Nassau (born 2006 and 2007 respectively), Tessy will be allowed to use the hyphenated surname Antony-de Nassau taking effect from September 2019. I am not sure why she has to wait so long, but it might be because Luxembourg law concerning name changes works that way. She is referred to as «Mrs. Tessy Antony» in the statement, but if it takes so long to get a new surname in Luxembourg, how is it possible to lose the surname de Nassau so quickly? She seems to believe that she is a Princess until September, although this is in conflict with the said press statement and house law. The name of her Instagram account is «Tessy from Luxembourg», by the way, while she at present calls herself «Tessy Antony, Princess de Luxembourg» on Twitter. I hope there will be more information on the issue in due time.
Updated on 8 April 2019 at 23:53 (reference to Tessy's Twitter account added).