But the last time she was on, back in 2012 to promote The Perks Of Being A Wallflower, it was awkward city!
On Thursday night's show, the Beauty and the Beast star recounted the story of her first interview with Fallon:
"I just dove straight in there with, ‘I love that Halloween candy thing that you do.' And there was just silence."
OMG! No wonder she hasn't been back in five years!
Of course we never saw that cringeworthy moment on the air. When Fallon explained to her she was talking about Jimmy Kimmel, Emma was so mortified they had to cut and re-tape the interview from the beginning! Ha!
Ch-ch-check out the whole story, and a much more graceful Emma (above)!