If the rumors are to be believed, then Justin Timberlake and Jessica Biel, who have been dating since 2007, are about to make things official. But what about Capt. Kelsey De Santis, Timberlake's date to the Marine Corps Ball?

On Monday, Tayloe Piggott Jewelry, a contemporary art/jewelry dealer based in Wyoming, announced that the couple had become engaged on its Facebook page.

The post alleged that Timberlake had proposed to Biel on Sunday while the two were at a luxury resort called the Amangani.

There's been no official word on whether the engagement rumor is true. But if it is, we bet Cpl. De Santis will be crushed!

Missed Timberlake's cute Marine Corps ball date? Watch it below.

[via The Stir]