Franz Ferdinand have confirmed they're hoping write a track for the new Harry Potter movie
BBC Radio got an update from Franz Ferdinands' guitarist Nick on the subject. This is what they've got on it:

"We were going to collaborate with Jarvis, Jarvis Cocker."
"He's written three songs already and he wants us to write another one with him, so hopefully we'll have the time and energy!"
"No, we do have the energy, I'm sure. It's such an exciting thing to do, it's incredible."
"They've asked us to be in the film. Something about the four weird sisters or ugly sisters, (it's actually the Weird Sisters) playing bagpipes or something, I don't know."