Domhnall Gleeson underwent quite the accent transfiguration on his first day on the Harry Potter set.

The Irish actor, who played Ron Weasley's older brother Bill in the film series' two-part finale Harry Potter and the Deathly Hallows , was supposed to say his lines while sounding like someone from England. Instead, the star of Peacock's new The Office spinoff The Paper veered too far from what was expected—all the way Down Under, to be exact.

"I went Australian and I couldn't stop," Domhnall said on the Sept. 3 episode of NBC 's Late Night With Seth Meyers . "The director was like, 'Cut!' And this weird long pause, and then the director came over and he was like, 'So you've gone Australian."

The 42-year-old continued, "And he was like, 'Is there anything you can do

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