Question: Andrea Albert Pierre Casiraghi, is the elder son of Caroline, Princess of Hanover, and her second husband Stefano Casiraghi, and is the eldest grandchild of Rainier III, Prince of Monaco, and which American actress, who became Princess of Monaco after marrying Prince Rainier III, in April 1956?
Sentence (from "Andrea Casiraghi"): He is the eldest grandchild of Rainier III, Prince of Monaco, and American actress Grace Kelly.
Relevant evidence: Yes