When Cary Grant is asked why he's wearing a woman's dressing gown, he exclaims: "I've just gone GAY!"
I think this may be the funniest movie ever made.

Hepburn and Grant at their comedic best. The film is light-hearted and convoluted, but the entire cast is outstanding, particularly Hepburn as a clueless heiress trying to trap an unwilling, stodgy Grant into her life.

Did I mention the runaway leopard?