Justin Timberlake, Jessica Biel Engaged! Who Will Design Her Wedding Dress?

Jessica Biel
Photo: Jamie McCarthy/WireImage
Jessica Biel in Giambattista Valli at the
FGI's night of Stars back in October.

Engagement rumors have been surrounding Justin Timberlake and Jessica Biel for weeks, and now Us Weekly has confirmation from multiple sources that the couple of four and a half years are indeed set to be hitched.

"Justin knows how much she loves snowboarding and the mountains, so it was the perfect place," an insider tells the magazine of the proposal, which is reported to have taken place in late December near Jackson, Wyoming.

And though sources say the William Rast co-founder has "never been happier," there's little mention of the juicy details we really want to know. Hello, ring? Wedding dress?

According to an earlier report from Life & Style Magazine, the Revlon campaign star "did [her] research" at Neil Lane last December, and has worn pieces from the jeweler in the past.

However, she opted instead for jewelry from Lorraine Schwartz (who designed Kim Kardashian's ill-fated engagement ring and wedding bands) with her crystal-embellished tulle Valentino gown at the New Year's Eve premiere in early December.

Which brings us to the wedding dress. Having scored a front-row seat at the Valentino Spring 2012 runway show, Biel also wore the label at the Charity Water Ball in mid-December, suggesting a strong bias for the Italian brand.

But don't count out Giambattista Valli, who could use the celebrity wedding as a springboard into bridal to flesh out his ever-expanding empire.

The self-professed "Valli girl" wore the designer's ruffled haute couture gown at the Fashion Group International's Night of Stars in October, and often relies on the designer for her red carpet looks.

So those are our two frontrunners ... may the best Val win!