Before Anthony Daniels was chosen to play the role of C-3PO in "Star Wars - A New Hope" our popular friend Bert auditioned for the part.
They shot several scenes from the start of the movie but George Lucas wasn't satisfied with Bert who kept calling R2-D2 Ernie, so he threw away all of the material.
Below you can see the only remaining evidence of this story: three pictures.
Picture 1: "Did you hear that Ernie? They've shut down the main reactor. We'll be destroyed for sure. This is madness!"