Keira Knightley was strangely taken for a pop star and still went with her

Keira Knightley readily admits that people often confuse her with other actresses.

Knightley, star of "Colette", revealed Tuesday in a television show of "The Late Late Show" that she had been approached by people who mistakenly think she's Kate Winslet, Rachel Weisz or Natalie Portman.

But a person in a store has already asked her to pose for a photo – believing she was pop star Britney Spears, said Knightley to host James Corden.

"It was strange," Knightley said. She still posed for the picture as Spears.

Corden chuckled at the revelation. "I would love to see this person with his friends," he joked.