What started out as a summer fling may end with a quickie engagement ring! According to an insider, after dating for just six months, Renée Zellweger and boyfriend Bradley Cooper are planning to walk down the aisle. “Bradley has fast-tracked the romance and he’s ready to get married,” explains the insider, who adds that a wedding will take place sooner than later. In fact, the Hangover star is so eager to tie the knot, that before appearing on Late Show with David Letterman on January 7, Bradley took the time to shop for a ring in New York. “He already has a setting he likes, but he visited various jewelers on 47th Street, including I. Friedman & Son, to look for a stone,” the insider reveals. The actor even went alone so he wouldn’t draw attention to himself. “He wore a hat and dark glasses and just walked right in.” The couple, who have each been married before, may be moving fast, but that doesn’t mean that Bradley, 35, won’t pop the question in a traditional way. “He is old-fashioned,” the insider says. “He’ll probably get down on one knee and propose in a romantic setting — and I wouldn’t be surprised if it was on Valentine’s Day.”