Internationally celebrated ballroom dancers Veloz and Yolanda were hired as uncredited dance doubles and choreographers for both "Bolero" and "Rumba". This fact was kept as a trade secret for decades. The long shots in Bolero are in fact of Veloz and Yolanda, though no indication is given that this particular dance number was one that the famed dance team ever performed as part of its own repertoire, while in "Rumba", the dance steps are actually a simplified variation of a Veloz and Yolanda routine performed the previous year in the movie "Many Happy Returns", starring Burns and Allen. The dance music in "Rumba", however, was apparently written specifically for that movie, though no title is found in the credits.