Cary Grant is the most represented actor starring in six films on the list. Humphrey Bogart is the second most represented actor with four films.
Marni Nixon uses her singing voice for Maria in West Side Story (1961), Terry McKay in An Affair to Remember (1957), Eliza Doolittle in My Fair Lady (1964) & Anna in The King and I (1956). She also uses her voice for her own role of Sister Sophia in The Sound of Music (1965).
William Wyler and George Cukor are the most represented directors with four films each. Mike Nichols, Rob Reiner, George Stevens and Billy Wilder each directed three love stories.
Seven of the top ten love stories feature couples that don't get together in the end.