Cher left stunned by Keira Knightley's unique performance

Keira Knightley leaves Cher shocked during the recent appearance on The Graham Norton Show.

The actress, famed for her role in the Pride & Prejudice, used her teeth and fingernails to play Cher's iconic track Believe.

Before starting to sing, Keira jokes, "This is sort of like some sort of a nightmare."

However, Cher, impressed by Keira’s performance, said, "She's hitting the notes!” She added, “You hit the notes! How do you know what you're—"

Keira responded with a laugh, saying, "I don't know, I don't know.”

The Boston Strangler actress shared, "I learned to do it as a kid. There was a kid at school who was cool, and he could do it, so we all did it."

Additionally, the host of the show, Graham also chimed in, noting, "It's really clever… but so pointless."

It is worth mentioning that this is not the first time Keira is showing her toothy tunes. Previously in a talk show, Keira played Raindrops Keep Falling on My Head and Despacito using the same toothy method.