The rumor mill is a-churning with rumblings that they recently got engaged at a swanky Wyoming resort, although details are scarce to nonexistent (not to mention Twitter-based) and their reps have yet to comment.
The question-popping whispers come nine months after Justin, 30, and Jessica, 29, announced their split.
Among the alleged reasons for the apparently mutual breakup: his wandering eye, her desire to walk down the aisle, and their feeling that the relationship had run its course.
But the romantic breather lasted only until July, when they were spied bike-riding in Toronto. From there, they quietly picked up where they left off.
"She is the single-handedly most significant person in my life," Timberlake told the July issue of Vanity Fair. "In my 30 years, she is the most special person, OK?"
Jessica, meanwhile, downplayed a possible knot-tying in the December issue of Elle, saying, "I don't feel pressured. I was never one of those girls who dreamt of my wedding and my prince charming."
As we wait to hear whether this will be an especially merry holiday season for the longtime twosome, let's look back at their romance ...