As the two were chatting about her upcoming role as Belle in Disney's live-action adaptation of the classic fairy tale, Beauty and the Beast, Watson's cell phone started going off, revealing her epic ringtone -- Tina Turner's 1989 hit, "Steamy Windows."
"That is so embarrassing!" she said, turning beet red. "That is my phone. That is Tina Turner."
Heyes insisted that "that's the best ringtone" he had ever heard, and we couldn't agree more!
"Well, I'm glad that I'm forgiven, because it was Tina Turner," Watson, 26, added. "Otherwise that would have been terrible. I'm so sorry!"
This isn't the first time an incident like this has happened to an A-lister, however. Last April, Ryan Gosling couldn't stop blushing when he received an ill-timed phone call during an interview with BBC Breakfast.