This was the first Abbott + Costello movie I ever saw...
When I was very young and couldn't stay up too late, the only Abbott & Costello I ever knew was the cartoons by Hanna-Barbera productions where Bud Abbott provided his own voice.
When I got a little older my parents let me stay up to watch my first live-action A&C movie which was the Mummy.
Ironically it was also the LAST movie A&C did...at least for Universal.