After Ambassador Sir Charles Hanbury-Williams reported to the British government that he had befriended the Grand Duchess Catherine, he was urged to seduce her. Sir Charles refused, saying "A man my age would make a poor lover. Alas, my sceptre governs no more."
Vanessa Redgrave (Empress Elizabeth) and Franco Nero (Count Vorontsov) met and fell in love while filming Camelot (1967). They had a child and, in 2006, married.
Both Julia Ormond and Vanessa Redgrave have played Guinevere, Ormond in First Knight (1995) and Redgrave in Camelot (1967).
Christopher Plummer's daughter, Amanda Plummer, played young Catherine in an episode of the CBS Radio Mystery Theater ("To Be an Empress") in 1982.
Maximilian Schell (Frederick the Great) and Vanessa Redgrave (Empress Elizabeth) both appeared in Peter the Great (1986), Schell in the title role and Redgrave as Sophia.