Eddy Waller worked in vaudeville and the theater before he entered movies in 1936. Within a few years he was being cast in character parts. In the 1940s he would be a mainstay in the westerns of Republic Pictures and would work with just about every cowboy actor from Tim Holt to Rocky Lane . With Lane, Eddy's billing would be as high as second, as he played grizzly old prospector Nugget Clark, adding the comic relief to a picture with such pearls as "He is as square as the day is long". The "B" western finally died out in the 1950s, and so did Eddy's career.

Allan Lane 's (aka "Rocky" Lane) sidekick in almost every one of his Republic films, Waller was one of only three people--besides the minister and funeral director--who attended Lane's funeral.