The 21-year-old actor - who has played the role of the young wizard for the past 10 years - admitted he felt the most pressure when shooting the final two movies in the popular franchise.
He explained: "It's a bit weird because we're all much more aware of these being the final films than I thought we'd be. It's not really distracting or disturbing me, but I think there is a bit more pressure.
"When we're done with 'The Deathly Hallows' that will be it, while before, at least subconsciously, we always knew we'd get another chance."
The British star likened playing the franchise's titular character to the role of Shakespeare's Hamlet because the part of Harry becomes so complex in the final two films.
Daniel said: "It is tougher. It is the hardest film to do, absolutely. When the seventh book came out, the producer David Heyman finished it a couple of days before I did, and he rang me up and said, 'How'd you fancy playing Hamlet?'
"Obviously, Hamlet's much harder, but it makes the point."