You're a down-to-earth goddess, Capricorn, and you look great in natural basics with a touch of old-world glamour. When Carolyn Bessette, a Capricorn, wed J.F.K. Jr. in the now-famous sliplike Narciso Rodriguez gown, she epitomized the clean, classic elegance of your sign. Bessette's simple tulle veil, semi-opaque white gloves and unfussy chignon were also oh-so-Cap. For you, less is more. Capricorn governs history, so you look best in an antique white like ivory or oyster. You're also the sign that rules masculinity and structure, so you might wear a wedding suit, or a gown with tailored or menswear-inspired touches, like buttons, a vestlike bodice, even a collar. Or try a sleek column dress altered to your exact proportions. A minimalist designer like Vera Wang or Angel Sanchez could be your new best friend. Gemstones and crystals look great on your gown—in moderation, of course. Capricorns can be reserved and formal, so a little bling can steer you mercifully out of plain Jane or frumpy territory. Your sign always loves a naughty little secret. Even if you look proper on the outside, slip into sexy underwear, a lacy garter or other surprises for your groom's eyes only.

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If you follow the K.I.S.S. mantra ("Keep It Simple, Sister"), you'll never go wrong. Evoke the Old Hollywood glamour of a classic film star, and wear your hair in a style that's loose but also "done." Or pull it all back into a well-structured chignon, encircled with a headband made of small, unvarnished stones. Keep jewelry to a minimum, like crystal drop earrings or another striking piece—or forgo it completely. You're an earth sign, so aim for terrestrial touches—a coral necklace, a flower or a vinelike bracelet. Capricorns also have an air of old money, so flaunt your astrological aristocracy with gloves and estate jewelry. You're an elegant earth goddess, so don't forget it. You should never look like you're trying too hard.

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As a traditional sign, you look great in a classic wedding ring. Capricorns rule history, so try on heirloom or estate jewelry, even a family ring. Or take inspiration from antiques. You like your sparkly status piece, but you're also an old-money sign that needs to show restraint, so find a happy medium. Jeweler Isaac Gottesman of Chicago's Dimend Scaasi (dimendscassi.com) recommends either an Asscher-cut diamond, which is very clear, step-cut and old-fashioned or a simple round stone that's curvy and feminine. He suggests a diamond solitaire (a single stone) in either a four-prong or a Tiffany style six-prong setting.

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You're a loyal sign, and you cherish the bonds that have lasted over time. Even if you've formed closer friendships in recent years, you love the notion of honoring your past, especially at your wedding ceremony. Only your oldest, truest friends and family should stand in your bridal party. Keep the bridesmaid dresses clean-cut, classic, even a little preppy. If possible, weave in a detail with meaning—a symbol from your shared history or backgrounds. If you grew up in a seaside town, give each maid a beautiful shell necklace, for example. With your love of tradition, you could also honor a family legacy. For instance, if your ancestors are from Kenya, a small kente cloth bow could adorn your bridesmaids' waists. The same fabric could be incorporated into the groomsmens' ties or pocket squares.

You can go one of two ways, Capricorn: earthy or aristocratic. If you're more the rugged type of Capricorn, then plan a no-frills outdoor ceremony in which the beauty lies in its simplicity. Rent a rustic ski lodge in Vermont or Aspen (you're the sign of the mountain goat) and wed barefoot (or in crystal-studded flip-flops) against a gorgeous natural backdrop of wildflowers. Make it a weeklong family reunion and put your guests up in beautiful wooden cabins (with a few classy amenities, of course). If you're the traditional breed of Capricorn, hold your ceremony at your childhood temple or church. Then serve a formal, plated dinner at a country club, an old estate or a grand art deco hotel. Use your initials or a motif as a monogram, and carry the theme throughout your reception. Your sign rules history, so you could get married at a national monument or a deeply meaningful place from your past. Alternatively, you could try a sleek, modern boutique hotel designed by a renowned architect—as long as it displays your taste and sophistication. Caution: Capricorns get hung up on rules and what's "appropriate," and that can zap the fun out of your planning process.

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Simple, old-fashioned glamour suits the Capricorn bride. For you, the floral and event designers of Martin Jobes Design (martinjobesdesign.com) recommend a gathered bouquet tied with French braided ribbon. "Instead of a bow, you might adorn your arrangement with a simple ribbon cuff, finished with a mother-of-pearl belt buckle," they say. Marrying outside? "Choose a graceful arbor covered with lush, fruiting blueberry branches (the unripe berries are a gorgeous green), jasmine and creamy roses," suggests the Martin-Jobes team. An architectural element, like a wedding arch, is the perfect frame for a wedding in a grand church or a gorgeous estate. Cover it with a family heirloom textile, or adorn it with lemon leaves, seeded eucalyptus and roses, they suggest. You can also pay homage to your new union with a silk aisle runner featuring your initials entwined in an oversize monogram.

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Sleek, refined and "less is more" is the way to go, Capricorn, so opt for a timeless cake in a classic flavor. Your love of traditions, history and legacies has you looking to the past for inspiration. What kind of wedding cake did your parents or grandparents have? Honor them by serving an updated recipe, and share the story on menu cards at each place setting. You're not big on emotional displays and prefer to show your appreciation through actions like this. Your sign rules structure and architecture, so a tiered cake with ornamental details will thrill you. Karen Rivera-Gorski of The Painted Cake (thepaintedcake.com) suggests caramel-colored round tiers with an intricate chocolate brown scroll pattern, similar to the ornate mendhi worn by Indian brides, or inspired by your favorite architectural detail. "Adorn the top with a chocolate monogram to match the invitations," suggests Rivera-Gorski. Your new initials, a family crest or a motif carried throughout your wedding theme can add the perfect decorative flourish.

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Err on the side of formality, Capricorn, and keep your invitations classic and elegant. Choose a heavy paper stock and invest in the best printing you can afford. Use a stately serif font that's clean and crisp—but skip the over-the-top scrolls and feminine swirls. The single ornate touch should be a motif, or a monogram fashioned from your initials. Your sign rules buildings and history, so browse architectural books or salvage shops for ideas. Old ironwork, carved mantels and columns can all inspire motifs for a first-class invitation design.

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• A fun and rugged beach wedding with tiki torches is a beautiful approach, suggests wedding planner Danielle Bobish of Curtain Up Events (curtainupevents.com). As an earth sign, there's nothing better than sand in your toes! Give your guests beach pails as welcome baskets filled with survival goodies. Have a basket of flip-flops at the party in case guests want to kick off their shoes and slip into something more comfy.
• Traditional? Bobish says to take the monogram or motif idea an extra step. Have a lighting designer project it onto the dance floor, ask your dress designer to sew it into the train of your gown, or monogram blue Swarovski crystals on the underside of your wedding shoes. There are a million places to put it! For the ceremony, order custom monogrammed hankies that ushers pass out with the programs.

Capricorn is the sign of the mountain goat, so a hiking trip can be the perfect way to decompress from all the wedding activity. Strap on a backpack and hit an exotic mountain range, or tour the Southwest by car or motorcycle, visiting the Grand Canyon and Sedona. Capricorns are career-driven; you like to work hard and play hard. Many Goats also love to lounge (you can sleep until dinnertime, given the chance!). Relax in five-star style. Find a luxury hotel on the beach in Thailand, or rent a private hut in Bali where a helicopter drops you at your doorstep. Capricorn rules history, and you may be fascinated by the past. If that's you, a trip to see the castles of Europe (think Scotland or Prague) will be the perfect honeymoon for your sign. You might also love Beijing. Revel in the many dynasties of history, visit the Great Wall of China, linger over a jasmine brew in a teahouse, and calm your soul among Buddhist monks.