EMMA WATSON has formed a band with her Perks of Being a Wallflower co-star, Logan Lerman.

"Throughout the movie, we all made music together," she told The Daily Mirror. "Our band was Octopus Jam. I sing and Logan is a classical composer and he created a piece for me. Most nights, we would sit and play music so that was fun."

The Vogue cover girl showed an interest in a possible music career earlier this summer - in August, she joined Icelandic musician and producer Ólafur Arnalds in a studio in Iceland, where she was shooting scenes for Darren Aronofsky's Noah.

Read more: Emma Watson - Style File