Ernesto de la Cruz is the shortest actor to ever appear in film. The Filipino was 2 feet, 9 inches tall and appeared in such classics as For Y’ur Height Only and The Impossible Kid using the name Weng Weng.
Weng Weng William Lawrence Sr Omnibit 8-27-18
I saw one of his movies. One scene had his large sidekick throw him through an open second-floor window to surprise the bad guys.