1942: His salary was $393,314, making him one of the highest-paid actors in Hollywood.
1943: He was stricken with rheumatic fever, which halted the production of any new Abbott and Costello features for over a year until Lou fully recuperated. The disease, which normally strikes children, damaged his heart and led to the heart attack that ultimately killed him at such a young age.
1959: He was set to star in the comedy series "It Pays to Be Ignorant", but died before production began.
1994: A life-size bronze statue of Costello holding a bat and wearing his trademark derby was placed in a downtown park in his hometown of Paterson, NJ.
After the death of his son, Lou Costello Jr., he performed "Who's On First" routine as normal, but with tears streaming down his face as he did so.
Along with partner Bud Abbott performed the "Who's on first" routine for President Franklin D. Roosevelt.
As an amateur boxer in Paterson, New Jersey, Costello won 32 straight fights before being knocked out. The loss ended his boxing career.
At the beginning of their career he insisted that any joint earnings with Bud Abbott were split 60-40 in Abbott's favor because of Bud's skill as a straight man.
Biography in: "Who's Who in Comedy" by Ronald L. Smith; pg. 1-3. New York: Facts on File, 1992. ISBN 0816023387
Brother of actor Pat Costello.
Brother-in-law of actor Joe Kirk.
Costello was a great admirer of Charles Chaplin. He claimed to have seen Shoulder Arms (1918) 30 times and The Gold Rush (1925) 16 times, and attempted - without luck - to buy the screen rights to The Kid (1921) from Chaplin.
Former amateur boxer
Founded the Television Corporation of America production company which produced "The Abbott and Costello Show" (1952) and "I'm the Law" (1953).
Grandfather of Marki Costello.
He and Bud Abbott are both nominees for the inaugural 2007 New Jersey Hall of Fame for their services to entertainment.
He and Bud Abbott are known in Italy as "Gianni and Pinotto", Abbott being Gianni and Costello being Pinotto.
He and Bud Abbott are the only two non-sportsmen honored in the Baseball Hall of Fame in Cooperstown, NY, USA, for their "Who's On First" routine. However, they are not members of the Baseball Hall of Fame.
He and Bud Abbott were so popular that there was an "Abbott and Costello" comic book that was published for about 10 years until their partnership ended in 1956.