Mack Sennett bathing beauties were pin-up girls for the doughboys of the First World War. Gloria Swanson, Marie Prevost, Phyllis Haver and Mary Thurman were Sennett bathing girls at this time.
Roscoe Arbuckle, now more familiarly known as “Fatty” Arbuckle, left Sennett to make his own comedies at Paramount. With Arbuckle in this setup were two clever acrobatic comedians, Buster Keaton and Al St. John. Before the year was out, Sennett was making his Keystone comedies for Paramount. Charlie Murray, Ben Turpin, Louise Fazenda, Chester Conklin, and Teddy and Pepper, a dog and cat, were now the cheif Keystone comics.