Hi, Maxence. For the purposes of obtaining an autograph, your best bet might be to be on the lookout for a public notice of an entertainment convention/expo in which Christopher Nolan is scheduled to appear and whereby time is actually set aside for autograph-signing. If you yourself are a celebrity like him, then never mind the aforementioned, though. As to be expected of somebody with such a high-profile status, Christopher Nolan has a number of publicity agents. The contact information can be viewed, for a limited time, at https://pro.imdb.com/name/nm0634240?s=cab38fe6-35c5-ad92-3df5-cb0d7068bbfb. I've provided this as a favor in good faith, but you have to understand that it will not always be possible to for a random IMDbPro subscriber to be convinced to act as a proxy for non-IMDbPro subscribers who desire information that might possibly only be found through IMDbPro. Please let us know if you are also interested in Christopher Nolan's brother and coworker, Jonathan Nolan. Sometimes it seems like Jonathan Nolan is criminally under-recognized in the media and popular culture. The brothers work together frequently.