Redmayne demonstrated his mating dance last night on "The Tonight Show Starring Jimmy Fallon," using the word "humiliating" multiple times along the way.

Harry Potter queen J.K. Rowling wrote the "Fantastic Beasts" script, and when Redmayne came to the part reading, "Newt performs mating dance," he had to do a double take. "Two words have never filled me with so much sweat." Fallon said you don't want to Google something like that, to which Redmayne replied, "But I did, of course. I went and looked 'weird random bird mating calls.' And I made a few videos that I would send to the director, they were the most humiliating things you've ever seen in your life." He said he'd then wait several "painful" hours until director David Yates responded with something like, "Not sure it's quite seductive enough..."

It was humiliating, Redmayne repeated, but then he offered to each Fallon the mating dance, which includes a loud bird call. ("Quick question: How tight are your pants?" ) Of course, the audience needed to see that happen, so watch it play out:

That is so adorkably hilarious. If we were rhino/elephants in heat, we'd totally go for it. "Fantastic Beasts and Where to Find Them" opens Friday, November 18.

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