Ryan Reynolds has more than Scarlett fever—he has a Scarlett fiancée.

Reps for both Scarlett Johansson and Reynolds confirm to E! News that the blond bombshell and her actor beau are engaged.

No further details, including when the question was popped, the size of her rock or whether they've set a wedding date, have been announced.

However, a source close to Johansson tells E! News that the couple have actually been betrothed "for a little while," and they have kept the engagement on the down-low because "they want to keep things private."

The 23-year-old actress and soon-to-be recording artist and the 31-year-old Definitely, Maybe star first stepped out publicly together in April 2007, just two months after Reynolds and fellow Canadian Alanis Morissette called off their own lengthy engagement.

Johansson, for her part, was previously linked to Josh Hartnett.

While we're not sure how Reynolds delivered the ring to his future missus, he may have gained inspiration from his latest movie, which costars Sandra Bullock and is rather aptly named The Proposal.