Question: what movies have been made into musicals?
Answer: Sunset Boulevard (1950) ... 
An American In Paris (1951) ... 
The Producers (1967) ... 
Monty Python And The Holy Grail (1975) ... 
Hairspray (1988) ... 
Aladdin (1992) ... 
The Lion King (1994) ... 
Billy Elliot (2000)