But also worth noting that it _wasn't_ the first to mix live action with animation. It had been used in shorts and experiments all the way back to 1900, but for a full-length film, Warner Bros. released You Ought to Be in Pictures in 1940. And The Three Cabelleros beat it by nearly two years:
https://www.youtube.com/watch?v=TRIBUlP3GC4
But also worth noting that it _wasn't_ the first to mix live action with animation. It had been used in shorts and experiments all the way back to 1900, but for a full-length film, Warner Bros. released You Ought to Be in Pictures in 1940. And The Three Cabelleros beat it by nearly two years: https://www.youtube.com/watch?v=TRIBUlP3GC4
More on that history here: https://www.motionpictures.org/2013/07/from-gene-kelly-to-th...