He was the third son of Prince Hans-Adam II and his wife, Countess Marie Kinsky of Wchinitz and Tettau.

[3] He then worked for Raiffeisen Private Equity Management and the American investment bank Brown Brothers Harriman.

[8] In August 2015, he and his wife attended a charity concert hosted by his sister-in-law Hereditary Princess Sophie at the Liechtenstein City Palace.

[9] The money raised was used for a joined project of Austrian and Liechtenstein Red Cross to help people in Eastern Ukraine.

[11] Prince Constantin initiated and hosted the Summer Rhapsody at the Liechtenstein Garden Palace in Vienna, Austria on 31 July 2020.

The couple had three children:[2] Princess Marie was born on 16 July 1975 in Graz, Austria as the sixth daughter of Count Alois Kálnoky de Kőröspatak (1931–2022) and Baroness Sieglinde von Oer (b.