Naomi Watts lived in a small town in Wales with her grandparents for a period of time when she was younger. And we'll bet you a million dollars you can't pronounce it.
"And can you pronounce the name of the town?" asked Jimmy Kimmel on "Jimmy Kimmel Live."
"Yeah. Llanfairpwllgwyngyllgogerychwyrndrobwllllantysiliogogogoch," said Naomi Watts.
"Wow," said Jimmy.
"Try it, try it, see if you can do it," said Naomi.
Naomi lived in a place called Llanfairpwllgwyngyllgogerychwyrndrobwllllantysiliogogogoch.
And even though the word looks like a cat just ran across a computer keyboard, it's not total gibberish.
According to The Huffington Post, the town's outrageously long name translates to "Saint Mary's Church in the hollow of the white hazel near a rapid whirlpool and the Church of Saint Tysilio of the red cave."
"Jimmy Kimmel Live" fans on Twitter were absolutely floored by Naomi's flawless pronunciation of the tricky name.
But we wonder if she can spit out this big daddy of a word: Taumata whakatangi hangakoauau o tamatea turi pukakapiki maunga horo nuku pokai whenua kitanatahu. It's the name of a hill in New Zealand, and it's the longest official place name in the world.
We can only hope no poor child ever has to spell these bad boys in a spelling bee. Though we're sure Naomi would totally nail it.
Watch Jimmy and Guillermo try it out for themselves: