Justin Timberlake, Jessica Biel's Wedding: Ring, Dress and Date Details!

USMagazine, Friday, February 24, 2012, 5:22am (PST)

Don't count on a long engagement for Justin Timberlake and Jessica Biel.

After nearly five on-and-off (and sometimes rocky!) years together, the recently engaged twosome plan to tie the knot later this year, an insider tells Us Weekly.

PHOTOS: Justin and Jessica through the years

"The big day's this summer at a private estate," an insider says of Timberlake, 31, who proposed to the actress, 31, in late December.

PHOTOS: Justin's many women

What will the stunning bride wear to become Mrs. Timberlake? "Monique Lhullier is her No. 1 choice for the dress," the source reveals of the beloved designer, whose dresses have been worn by such A-list brides as Reese Witherspoon, Jessica Alba, Vanessa Minnillo and Shannen Doherty.

PHOTOS: Most over-the-top weddings ever

In keeping with the couple's uber-private M.O., it took Biel about six weeks to debut her engagement ring; she finally sported the rock (showing it off to Amy Poehler and Kristen Wiig!) at a Saturday Night Live afterparty at NYC's Ristorante Asellina Feb. 18. "It wasn't huge," a witness says. "It looked vintage and might have been custom made."

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