6. Humphrey Bogart & Lauren Bacall

Lauren BacallHumphrey Bogart
Humphrey Bogart and Lauren Bacall called each other Steve and Slim, the characters they played in their first film together, "To Have and Have Not" in 1944. Bacall's famous line in that movie was: "You know how to whistle, don't you, Steve? You just put your lips together and blow." For... Dick Strobel, AP