DESCRIPTION:
In the credits to the film, "The International", Matt Bellamy is listed as the composer to part of the soundtrack.

A quote from Dom:
"Matt [Bellamy] did the end credits for a film called The International," said Howard. "It's not something we've done as a band, but we sometimes get asked for that kind of thing."

It remains unclear how far he was involved in it though

HD version: http://www.youtube.com/watch?v=a1kXu6vcyC8