| Prince Carlo Alessandro | |
| Full Name: | Italian: Carlo Alessandro |
| Reign: | 17 March 1986 – present |
| Reign-Type: | Period |
| Succession: | Duke of Castel Duino |
| Predecessor: | Raimundo |
| Successor: | Prince Dimitri |
| Suc-Type: | Heir-Apparent |
| Issue: | Prince Dimitri Prince Maximilian Princess Constanza |
| House: | Thurn and Taxis |
| Father: | Raimundo, 2nd Duke of Castel Duino |
| Mother: | Princess Eugénie of Greece and Denmark |
| Birth Date: | 10 February 1952 |
| Birth Place: | Neuilly-sur-Seine, Île-de-France, France |
Prince Carlo Alessandro della Torre e Tasso, 3rd Duke of Castel Duino (born 10 February 1952) is the current head of the Castel Duino branch of the House of Thurn and Taxis.[1]
Carlo Alessandro is the only child of Raimundo, 2nd Duke of Castel Duino and his wife Princess Eugénie of Greece and Denmark. He was born in Neuilly-sur-Seine, Île-de-France, France.
He is a maternal second cousin of Charles III, King of Great Britain, through their shared great-grandparents, King George I and Queen Olga of Greece, born a Grand Duchess of Russia.
Carlo Alessandro married Veronique Lantz, daughter of Gérard Lantz and his wife, Monique Rachet, on 10 February 1976 in Saint-Tropez, Provence-Alpes-Côte d'Azur, France. Carlo Alessandro and Veronique have three children:
Carlo Alessandro and his family currently reside at Duino Castle in the Province of Trieste, Italy.