Danielle Radcliffe says he feels "almost guilty" for making "stupid" amounts of money from the Harry Potter films.
The 22-year-old actor said: "I got paid so well for doing the Harry Potter films, it's ridiculous.
"If somebody asked me, 'Did you think you deserve that money?' No, of course I didn't. 'But would you have taken it anyway?' Of course. "I happened to have found this industry where people get paid stupid amounts of money.
"That's the reality. I feel almost guilty for having done so well out of Potter."
The 22-year-old actor made the comments while speaking about his involvement in The Trevor Project, a charity which seeks to prevent young gay people from committing suicide, to Parade magazine.
He said fame was "very useful" in directing attention towards projects and he felt a "moral imperative" to help others.
"There is a sense that you have to do something. I feel Brad Pitt would agree that the way to help is to really get behind things that you're passionate about, like The Trevor Project. You have to give back," he said.
Radcliffe, who's been dating production assistant Rosie Coker for a year after meeting her on the Harry Potter set, admitted romance hadn't come naturally to him.
He said: "I hated dating because I'm crap at it! "With Rosie, I didn't know what was appropriate, like on which date you're supposed to try and kiss her.
"At the end of the second date I pulled a move out of the Bela Lugosi 'Book of Woo' -- I went to kiss Rosie and at the last minute lost my nerve and ended up kissing her neck, which is such a weirdly intimate place to kiss somebody on a second date.
Afterward, I texted her, saying, 'I'm sorry, what I just did probably seems very odd to you.'
Fortunately, she just found it really funny, so she kept coming back."
Radcliffe recently admitted that Rosie had given him a two-year deadline to become domesticated.
Offering his thoughts on marriage, he said: "I've got a great example to look at in my parents, because they've been married for at least 25 years and, I think, they were together for about five more before that. So they've been together a long time. I wouldn't recommend anybody marrying an actor, really.
"Of course, there are cases where it works, but I'm an actor and I know what I'm like. Actors and actresses are generally pretty neurotic."
Radcliffe said he was realistic about the limits of his success. "I have accepted that," he said "In a way it's a great relief that I will never, ever do a film as successful as the Harry Potter series. But neither will anybody else. Or it will take them a long time."