John Williams, who has been contributing incredible soundtracks to films for over six decades, may be moving on from film composition after he completes work on Indiana Jones 5. The composer first told reporters about his plans and even hinted that the film’s star Harrison Ford may retire as well. “At the moment I’m working on Indiana Jones 5, which Harrison Ford – who’s quite a bit younger than I am – I think has announced will be his last film. So I thought: If Harrison can do it, then perhaps I can, also.” Ford has not actually announced any such retirement yet, but the 90-year-old Williams…