The couple hope to exchange vows next year and want an outdoor ceremony at Lake Michigan, near where the bride-to-be's family live.
A guest list is also already taking shape, with Daniel's Harry Potter co-stars Emma Watson and Rupert Grint top of it.
The Harry Potter star has done his best to keep his love life out of the headlines over the years, making a success of it as it was recently confirmed he has been dating Erin Darke for around two years.
The pair are said to be extremely happy together, with a new report suggesting the 24-year-old actor has already popped the question."They’re trying to keep it low-key, because he’s very private," an insider told US magazine Star. It’s the happiest we’ve seen him in years."It's claimed the happy couple haven't made an official announcement yet because they are yet to settle on engagement ring.
He added that the last movie was going to be extremely fast-paced with a lot of action, while the first part would be far more sedate, focusing on character development; he added that, had they combined them, those things would not have made it to the final cut.
Despite positive feelings about the movies, he has no interest in doing more Harry Potter films.
"When growing up, I thought of marriage as being very official, drawing up a contract.
Radcliffe received nominations for "Best Male Performance" and "Global Superstar" at the 2010 MTV Movie Awards.
Emma is apparently good friends with Erin and thinks she is the perfect match for her pal, while Rupert is being tapped as best man material.
News of Daniel's reported engagement will come as little surprise to his fans, as the star has gushed about how much he values the institution of marriage in the past."Yes, absolutely," he told Parade magazine when asked if he will ever tie the knot.
Charles Spencer of The Daily Telegraph wrote that he "displays a dramatic power and an electrifying stage presence that marks a tremendous leap forward." He added: "I never thought I would find the diminutive (but perfectly formed) Radcliffe a sinister figure, but as Alan Strang ...
there are moments when he seems genuinely scary in his rage and confusion." His first post-Harry Potter project was the 2012 horror film The Woman in Black, adapted from the 1983 novel by Susan Hill.
He has contributed to many charities, including Demelza Hospice Care for Children, and The Trevor Project for suicide prevention among LGBTQ youth, which gave him its Hero Award in 2011.