Princess Sophie Caroline Marie Wilhelmine of Luxembourg[citation needed] (14 February 1902 – 24 May 1941) was the sixth and youngest daughter[citation needed] of Grand Duke William IV and Infanta Marie Anne of Portugal.

[citation needed] Sophie was born in Berg Castle, Colmar-Berg, Luxembourg.

[citation needed] Two of Sophie's elder sisters reigned as grand duchesses of Luxembourg: Marie-Adélaïde and Charlotte.

Sophie married Prince Ernst Heinrich of Saxony,[citation needed] youngest son[citation needed] of the last Saxon monarch Frederick Augustus III and his wife Archduchess Luise of Austria, Princess of Tuscany,[citation needed] on 12 April 1921 at Schloss Hohenburg.

[citation needed] Following her death, Ernst Heinrich married secondly and morganatically to Virginia Dulon on 28 June 1947 in Paris.