Simplify the following text for a Grade 6 native English-speaking person.
Original: Singin ' in the Rain is a 1952 American comedy musical film starring Gene Kelly , Debbie Reynolds , Donald O'Connor and Jean Hagen and directed by Gene Kelly and Stanley Donen , with Kelly also providing the choreography .
Simplified: Singin ' in the Rain is a 1952 movie musical starring Gene Kelly . It was directed by Kelly and Stanley Donen .