Very funny, very tense and a good mystery

I never saw these actors but this movie was so funny. Kitty talks too much, bosses Johnny around to much but is very clever. 3 murders take place and they are at all of them. They hide in closets, walk out on widow ledges and these parts are all very tense. Toward the end when her and Johnny meet some gangster like people who intend to get some info from them Kitty uses her pocketbook and whacks each one back and forth on the head, kicks her legs and gives the men a hell of fight which is so funny.