 Reportedly, while shooting the movie, the four stars had become  close friends, and William Powell (I) (qv) even gave up his old  habit of hiding out in his dressing room between scenes so he could  join in the fun with the rest of the cast. One of the biggest jokes  was a running gag Spencer Tracy (qv) played on Myrna Loy (qv),  claiming that she had broken his heart with her recent marriage to  producer Arthur Hornblow Jr. (qv) He even set up an "I Hate  Hornblow" table in the studio commissary, reserved for men who  claimed to have been jilted by Loy.