In a new interview with movieline Ciaran Hinds talks about Harry Potter and the Deathly Hallows.

[SPOILER ALERT] How did you wind up in a Harry Potter film (Harry Potter and the Deathly Hallows) playing a member of the Dumbledore clan?
Dumbledore’s kid brother! Dumbledore was about 123, so that makes me 115. Dumbledore’s passed away in the story, but there’s some link back to his earlier childhood that needs to be revealed to the… well, they’re not so much kids anymore. They’re young adults. I was asked, “The director wants to meet you, because he knows your work and thinks you might suit this role.” We just met, and he was very lovely. It was just, “I’d like you to do this; I think it’s going to work out.” It was only like four days’, five days’ work. But it did involve a lot of prosthetics. What’s great is that I won’t be hassled by anybody in the street because they won’t know who was in there.