The 22 year-old played the role of wizard Draco Malfoy in the films, along with actors such as Emma Thompson, Maggie Clark and Helena Bonham Carter.
Felton said to MTV News: 'The last thing I wanted was to be the pesky young guy who's asking them a thousand questions about old projects. But realistically, they're the nicest people in the world.
'As soon as you ask them a question, they usually have a dozen answers to throw at you, especially Jason [Isaacs]. He's been incredibly good with telling me stories.
'Also on-screen as well as off-screen tips. They're not necessarily telling you what to do, but you can just watch them and learn from their mannerisms, which is always exciting.'