Emma Watson formed a band with her co-stars on 'The Perks of Being a Wallflower'.

The 22-year-old actress teamed up with her castmates - including Logan Lerman - to start a group called Octopus Jam and write some songs.

She said: "Throughout the movie we all made music together. Our band was called Octopus Jam. I sing and Logan Lerman is a classical composer, and he created a piece for me. Most nights we would sit and play music, so that was fun."

Emma - who has been famous since she was 10 after starring in the 'Harry Potter' movies - also spoke about how she used to feel isolated when she was growing up because she felt different to her peers.

She is quoted by the Daily Mirror newspaper as saying: "It made me aware my life has been very different and unusual, my life has almost been done backwards. There are certain parts of my development that are happening at certain times and in different orders and at times that felt lonely. But, overall, I feel privileged to have had so many different experiences."