'BeyJaycé' A.K.A. BEYONCE AND JAY-Z OFFICIALLY MAN & WIFE.

Sources tell Usmagazine.com that Jay-Z and Beyoncé tied the knot at the rapper's apartment in NYC's Tribeca neighborhood Friday night, although their reps will not confirm. Former Destiny's Child singers Kelly Rowland and Michelle Williams, and Gwyneth Paltrow and Chris Martin were among the guests who attended the ceremony. A Reverend was also spotted. The singer donned a veil and a white dress with a low V-neck and thick straps. Her hair was in a half ponytail with ringlet curls, decorated with a white flower. The party was still going strong at 3 a.m. this morning. Beyoncé's father, Mathew Knowles, spoke about his daughter's nuptials in business meetings Friday. "Beyoncé's dad said he's sorry he couldn't have invited [more people] to the wedding, but they're keeping it small," a source close to the family tells Usmagazine.com.

Jay-Z, 38, and Beyoncé, 26, have always dodged questions about tying the knot. In 2007, the always tight-lipped rapper would only tell reporters: "One day soon - let's leave it at that." Are kids next for the couple? "One day I hope to be married with children" Beyoncé told Ellen DeGeneres in 2006. "I don't want to retire at 30, I want to relax," she said. "I still want to make albums and movies, but at a slower pace."

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Early Friday, white checked linens were delivered, as well as boxes of white flowers. Tall silver candelabras were stacked on the street. A white tent was visible on the roof of the building.

Why wed on April 4? They're obsessed with the number! The rapper named his club 40/40 after a baseball term. (If a player hits 40 home runs and steals 40 bases in the same season, it's considered a major coup.) The couple also have matching IV tattoos on their ring fingers, and they were each born on the fourth day of a month (Beyoncé on September 4; Jay-Z, December 4).