A lot of popular character actors inhabited these movies too. Among them were Edward Everett Horton, the above mentioned Walter Connolly, Franklin Pangborn, the ever rotund Eugene Pallette, Alan Mowbray, and Edward Arnold.
Although there were a few more screwball films made in the 1940's, the style had pretty much run its course by the early 1940's. With the onset of World War II, the Depression finally ended and with it the feeling for frivolity. War pictures became popular as part of the fighting mentality and people turned their attention to more serious matters. The day of the screwball comedy was basically over but not forgotten by the Depression audiences of the 1930's.