So what was Van Dyke’s relationship with Andrews like off-screen?
According to Andrews, the two “hit it off from day one” as she toldVanity Fair.
“I performed with Mary Poppins' demure, ladylike version of the step,” Andrews explained.

“But Dick flung his legs up so high that I burst out laughing.
To this day, he can still execute that step.”
“It scared me to death.

It could have been used to tune a piano.
She was pitch-perfect and I never was.”
As it turns out, they very nearly were.
“I thought the script had too many holes and unanswered questions.
However, each time I said no, Cubby came back with more money.”
“Not a problem.
My character was suddenly an eccentric American inventor,” he said.