Donna Marina Olimpia Cristina Shields

Marina Torlonia, Princess di Civitelli-Cesi was an Italian-American socialite and aristocrat best known as the paternal grandmother of the actress and model Brooke Shields.

She was born in Rome at Palazzo Torlonia, the youngest daughter of Don Marino Torlonia, 4th prince of Civitella-Cesi and his wife, Mary Elsie Moore, a daughter of Charles Arthur Moore, a shipping broker and hardware manufacturer from Connecticut. Her brother was Don Alessandro Torlonia, 5th Prince di Civitella-Cesi, the husband of Infanta Beatriz of Spain (an aunt of King Juan Carlos I of Spain).

The Torlonias were one of the richest Italian families of the 19th century, gaining their fortune in the administration of Vatican finances and through Olimpuccia Giustiniani, she is a descendant of Olimpia Maidalchini and a niece, many generations after, of Innocent X.

Donna Marina Torlonia's first husband was Francis Xavier Shields (1909 - 1975), the American amateur tennis player, whom she met in Rome at a tennis championship. They married in 1940 in North Conway, New Hampshire. The Shields' had two children: Francis Alexander Shields (the father of the actress and model Brooke Shields) and a daughter, Marina Shields. They later divorced.

Her second husband, whom she married on 29 December 1950, was Edward W. Slater, an architect, by whom she had a son, Edward (born 1955).