Married in 2006, the couple have two children, Gabriel and Noé. They were the first grandchildren of the current generation of the royal family. Prince Louis is the third son of Grand Duke Henri and Grand Duchess Maria Teresa.

The couple announced their separation earlier this year, and were granted a quick divorce in February. Tessy was granted a “quickie divorce” on the grounds of “unreasonable behaviour” at the Central Family Court in London. No details of what the “unreasonable behaviour” entailed were released, but the divorce application was apparently undefended, according to a report in the Daily Mail.

Details of the new dispute have also not been unveiled after the High Court imposed reporting restrictions. The Telegraph did report that Tessy’s council Deborah Bangay QC, told the court: “My client has no wish to litigate and she made a very reasonable and sensible proposal. Unfortunately, that proposal was rejected and my client had no option but to pursue this in litigation.”

However, the case has hit the international headlines in a rather more unsavoury manner than necessary when newspapers picked up on an item in discredited Luxembourg gossip magazine Privat that labelled Tessy a “gold digger”.

Prince Louis’s counsel, James Ewins QC, has said that the prince is appalled at the article and denies any collusion to brief the media against Tessy. “We share their disgust and will do anything we can to stop this happening.”