THE rules of engagement

Keepsake Diamond Jewelry, Bride’s magazine and Columbia Pictures are teaming for a special promotion, “Sparkle Like a Diamond,” which debuts in the magazine’s December/January issue.

A two-page advertisement features a sweepstakes and marketing tie-in with an upcoming film, Columbia’s The Wedding Planner, starring Jennifer Lopez and Matthew McConaughey. A national contest winner will receive the Keepsake engagement ring featured in the flick, as well as a trip for two to the film’s Hollywood premiere. One slight catch: You’ve got to be getting hitched to win.

” ‘Sparkle Like a Diamond’ creates just the right environment to help increase Keepsake’s brand awareness and to introduce our new collection,” said Rebecca Foerster, vp of marketing and brand manager at New York-based Keepsake. “Both Bride’s and The Wed-ding Planner are perfect media outlets for reaching our desired audience.”

Contest entry forms are available in Bride’s, at the New York-based magazine’s brides.wedding-channel.com Web site and at Keepsake retailers.