The Friends With Benefits actor, 31, and the I Now Pronounce You Chuck and Larry actress, 30, swapped vows in front of 150 close friends and family members October 19 at the Borgo Egnazia, a vast hotel complex surrounded by olive trees and cactus plants.
Famous attendees included comedian Andy Samberg, 34,'N Sync singer Chris Kirkpatrick, 41, 7th Heaven actress Beverley Mitchell, 31, hip-hop producer Timbaland, 40, and music manager Johnny Wright, 52.
The bride and groom took extra precautions" to keep their wedding location top-secret, flying guests to Germany, then to Italy, without ever revealing their final destination. "Justin wanted to be very slick with it!" a source close to the groom explained to Us Weekly.
The weeklong celebration was shrouded in secrecy, and Biel had deflected questions about her big day's details for months. "I am one of those people who is not very detail-orientated," she said during a British TV interview in August.
Timberlake proposed to Biel, his on-and-off girlfriend of five years, in December 2011 with a six carat diamond ring, worth an estimated $130,000. A source told Us the Tennessee native "went rogue" and designed the bauble "on his own."
The couple decided to get married in Italy because "the location means a lot to them," according to a source.