Who said "By golly, hard work is the key to success."?

This quote is attributed to Mickey Mouse.

By golly, hard work is the key to success. - Mickey Mouse

"By golly, hard work is the key to success."

Mickey Mouse Work

"Hot dog!"

"Oh boy!"

"Gosh!"

"That's swell!"

"Hard work never killed anybody."

"Work with purpose and integrity."

"Hard work pays off in the end."

"A man's gotta do what a man's gotta do."