Movie screenshot of <a href="https://en.wikipedia.org/wiki/Fred_Astaire" class="extiw" title="w:Fred Astaire">Fred Astaire</a> and Astaire's choreographic collaborator <a href="https://en.wikipedia.org/wiki/Hermes_Pan_(choreographer)" class="extiw" title="w:Hermes Pan (choreographer)">Hermes Pan</a> in the opening section of the "I Ain't Hep to that Step But I'll Dig it" routine from <i><a href="https://en.wikipedia.org/wiki/Second_Chorus" class="extiw" title="w:Second Chorus">Second Chorus</a></i> (1940). Note: Hermes Pan is standing third from left and is holding a clarinet. This is Pan's first ever appearance on film.
<a rel="nofollow" class="external free" href="https://archive.org/details/second_chorus">https://archive.org/details/second_chorus</a>