Make 'Em Laugh - hilarious movies, part 1

Last week, on Facebook, I asked people to tell me their favourite ffamily-friendly comedy movies, the more ridiculous, the better.

I had so many responses that I've had to split the list into two parts. 
Today, I'll list the movies from the 20th Century, up to 1990.
Each title will link to its IMDB information page, where you can find a summary, as well as some options for watching the movie.

A Day at the Races (1937) - dir. Sam Wood 

Bringing up Baby (1938) - dir. Howard Hawks

It's a Mad Mad Mad Mad Mad Mad World (1963) - dir. Stanley Kramer

That Darn Cat (1965) - dir. Robert Stevenson

The Great Race (1965) - dir. Blake Edwards

The Russians are Coming! The Russians are Coming! (1966)  - dir. Norman Jewison

The Producers (1967) - dir. Mel Brooks

What's Up Doc? (1972) - dir. Peter Bogdanovich

Blazing Saddles (1974) - dir. Mel Brooks

National Lampoon's Animal House (1978) - dir. John Landis 

The In-Laws (1979) - dir. Arthur Hiller

Airplane (1980) - dir. Jim Abrahams & David Zucker

Honky Tonk Freeway (1981) - dir. John Schlesinger

American Dreamer (1984) - dir. Rick Rosenthal

The Goonies (1985) - dir. Richard Donner

Ruthless People (1986) - dir. Jim Abrahams & David Zucker

The Money Pit (1986) - dir. Richard Benjamin

Little Shop of Horrors (1986) - dir. Frank Oz

Ferris Bueller's Day Off (1986) - dir. John Hughes

Inner Space (1987) - dir. Joe Dante 

Planes, Trains & Automobiles (1987) dir. John Hughes

K-9 (1989) - dir. Rod Daniel