Glenn Miller - In The Mood.  This is a scene from &quot;Orchestra Wives&quot;, the o only movie Miller appeared in (he&#x27;s playing the lead trombone).  But pay close attention when the camera switches from Miller to the pianist - the guy playing the piano looks like the same guy who played  Fred Gailey (the lawyer who represented Santa Claus) in &quot;Miracle on 34th Street&quot;..could it be he?