Sergeant Deadhead is a 1965 musical comedy film starring Frankie Avalon. It features many cast members who appeared in the Beach Party movies.
OnMarch 1965 it was announced that Tommy Kirk would star. However Frankie Avalon ended up taking the role instead.The script by Deke Heyward would not write in gags for Buster Keaton. It would simply say Buster does a bit here and Keaton would come up with something on his own and show it to the director. ........
Source: Wikipedia