"I've known you for a pretty long time now", he said.
"Anything but Anne", she replied.
"And then finally, I just have this spark and I go, 'Okay Johnny, but what about Santa?' " the actress recalled, noting that her technique proved immediately effective.
But her friends call her "Annie" and others use "Hath" or "Miss H". On Tuesday night's episode of the late-night talk show, Fallon asked Hathaway whether he should refer to her as "Anne" or "Annie".
"They asked me, 'What do you want your name to be?' And I'm like, well, it should be my name".
Hathaway's mother is the only one who calls her "Anne" and she only does it when she's mad, the 38-year-old said.
She also said that her first celebrity crush was Leonardo DiCaprio, 46, and later amended her answer to also add Pearl Jam frontman Eddie Vedder, 56.
Click inside to find out why her professional name is "Anne" when she prefers "Annie"...
"People are like, "Anne!".
"And so that seemed like the right choice, but it never occurred to me that for the rest of my life people would call me "Anne".
Hathaway previously opened up about finding the silver linings of parenting amid the COVID-19 pandemic in November, telling Stellar magazine that she's "always hesitant to frame things in the realm of challenges because I think it sets a tone".
She also encouraged Fallon and the audience to call her "anything but Anne".
"People are like, 'Anne!' And I'm like 'What?"
The actress, on Tuesday, said that she was into vintage fashion and chose to wear her mom's pair of metallic gold disco shoes to school. Some minutes, I'm like, 'Yes, absolutely, ' and some minutes the world scares me too much and I think I've got two healthy ones and that feels really great.
"The actress also spoke about spending time at home with her two sons â€" Jonathan, 4, and Jack, 1 â€" with her husband, Adam Shulman. "So 4 and 1, the ages are the ages that they are but there's a lot of magic in those ages", she shared. "Our four-year-old believes everything we tell him and that's adorable as well as very useful".