Ms. DaSilva, 26, thinks of herself as adventurous, but not so brash that she is about to cross a line. Dressing for a wedding as if it were an after-party is accepted among her family and friends. “For my generation, looking like a virgin when you marry is completely unappealing, boring even,” she said. “Who cares about that part anymore?”

Ms. DaSilva is typical of a growing number of brides flouting convention by flaunting their curves. More vamp than virgin, many are selecting gowns that bare a generous expanse of cleavage, midsection, lower back or thigh, temptress styles that may be better suited to a gala or boudoir than to a church or ballroom.

“Brides today absolutely want to look sexy and glamorous,” said Mara Urshel, an owner and the president of Kleinfeld, the venerable Manhattan bridal salon. In recent months, the store has seen a spike in demand for plunging necklines and negligee looks, one that has only intensified since the spring bridal collections began arriving in stores. For brides shopping now for gowns to wear at summer or early fall weddings, “there is a lot of freedom of choice, and these girls exercise every bit of it,” Ms. Urshel said.

Determined to look torrid on their wedding day, they are picking dresses modeled, say, on the one worn by Christina Aguilera, who was married in 2005 in a gown with a plummeting neckline and ruffled fishtail hem. Or maybe the hope is to emulate Sarah Jessica Parker, who, in the forthcoming film version of “Sex and the City,” spills out of the front of her wedding dress.

“Young women increasingly look to the red carpet for style ideas,” said Millie Martini Bratten, the editor in chief of Brides magazine. “They are very aware of how they look,” she added. “They diet, they work out. And when they marry, they want to be the celebrity of their own event.”