"They pulled a fast one on everybody! They are in the middle of their ceremony at a very fancy private estate and members of the wedding party are staying at the Four Seasons Hotel there."
However, she later added on Saturday: "Last night turned out to be the rehearsal dinner and the wedding is actually today."
Wedding cake designer Sylvia Weinstock also fuelled the wedding rumours after she revealed that she was in Jackson Hole over the weekend.
She wrote: "America is a beautiful country Jackson hole a marvel (sic)."
But you might want to hold off on the congratulatory messages. Several sources claim that the pair did not say "I do" this weekend.
"It didn't happen," a source close to the couple told E! Online.
A Timberlake family member also told Gossip Cop that the duo didn't wed in a "top secret" ceremony.
Besides, they're not ready to become Mr and Mrs just yet, according to Us Weekly.
"Justin and Jessica are seriously still in the early planning stages of the wedding and don't have it all figured out yet, as Jessica keeps saying," an insider told the website.
"They are both working [a lot]."
Another source points out that Timberlake wasn't anywhere near Wyoming this weekend. Word is he was busy filming upcoming thriller Runner, Runner co-starring Ben Affleck, in Puerto Rico over the weekend.
And Total Recall star Biel? She was spotted arriving at the airport in Puerto Rico on Saturday.
Earlier this month, Biel, 30, said she and her 31-year-old fiancé were in no hurry to get wed.
Biel told the Chicago Sun Times: "I'm just enjoying being engaged. I do feel like there is a lot of time and nothing needs to be rushed.
"Everyone tells me that being engaged is the really special moment. Not that it gets bad when you get married! But being engaged is just absolutely amazing. You're in this romantic, ahhhhh, breathless moment that I'm just trying to extend as long as possible."
She was also quoted as saying: "I have no idea of what I want. I am one of those people who are not very detailed orientated. I don't feel like I'm one of those people who is like, 'This has to be done this way.' I'm more of a big idea person.
"I will probably give an idea and let it be created. I feel like most of my friends, bless them, always go through some sort of something - one day of 'bridezilla'. Maybe it's just part of the experience."
The couple started dating in 2007, and split briefly in March 2011. Timberlake reportedly proposed to Biel in Jackson Hole in December of last year.
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