The couple reportedly has already had their bachelor parties, Biel went for mystery wedding dress shopping sessions and the couple has been taking random trips to Europe.
It seems that the only thing left for the couple to do is finally tie the knot.
Timberlake, 31, and Biel, 30, were engaged 10 months ago in a luxury mountain resort in Jackson Hole, Wyoming, the Huffington Post reported.
Us Weekly quoted “ultra-private” sources who explained that the wedding festivities already started to kick-off on Oct. 16 in order to prepare for the "intimate, rustic ceremony" that will be attended by family and friends.
Sources who spoke to Life & Style have similar reports:
"The wedding was top-secret, hush-hush," an insider explained to the publication. "Guests were warned that any phones or cameras would be confiscated, so best to leave them at the hotel."
The couple have been dating on and off since 2007.
"[Biel] is single-handedly the most important person my life," Timberlake told Vanity Fair in June 2011. "In my 30 years, she is the most special person, ok? I just don't want to say much more, because I have to protect things that are dear to me -- for instance, her."
Do you think a surprise wedding will be eminent for the celebrity couple?