Roy Rogers – Himself; Narrator; Singer (Pecos Bill) Trigger, the Smartest Horse in the Movies – Himself Dennis Day – Narrator; Singer; Characters (Johnny Appleseed) The Andrews Sisters – Singers (Little Toot)[1] Fred Waring and the Pennsylvanians – Singers (Trees) Freddy Martin – Music composer (Bumble Boogie) Ethel Smith – Organist (Blame It On the Samba) Frances Langford – Singer (Once Upon a Wintertime) Buddy Clark – Singer; Narrator Bob Nolan – Himself; Singer; Narrator (Pecos Bill) Sons of the Pioneers – Themselves; Singers; Narrators (Pecos Bill) The Dinning Sisters – Singers (Blame It On the Samba) Bobby Driscoll – Himself (Pecos Bill) Luana Patten – Herself (Pecos Bill)