Actor Daniel Radcliffe has reportedly proposed to his girlfriend of nearly two years.

The Harry Potter star, 24, and Erin Darke are reportedly keeping the happy news secret until they have decided on an engagement ring, which they hope to pick during an upcoming trip to Paris, France.

A source tells Star magazine, "They're trying to keep it low-key, because he's very private, but they're both bursting with excitement. It's the happiest we've seen him in years."

According to the magazine, the couple is planning to tie the knot next year (15) at an outdoor ceremony near Lake Michigan, where Darke's family lives.