Twilight actress Kristen Stewart has revealed the Jewish song that helped launch her career.

The non-Jewish star, 21, took part in a Chanucah concert when she was at school and her performance was so impressive that she was signed up by an agent.

She told W magazine that she was asked to sing a song about a dreidel.

"I've never celebrated Chanucah - it wasn't in my upbringing, but it was one of those deals where everybody has to pick a song or participate somehow in the chorus," she explained.

"It wasn't the normal dreidel song; I can't really remember the words, but it was a more serious dreidel song.

"The dreidel was huge, it was really honoured," she added. "And that's how I met my agent, who was in the audience.