Justin Timberlake engaged to Jessica Biel (Kevin Mazur/WireImage)

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The singer-and-actor is said to have proposed to the actress last month during a pre-Christmas break in Jackson, Wyoming, after they recently reunited following a three-month split.

Justin's grandma Sadie Bomar told RadarOnline.com, "Yes, Justin is engaged. Jessica is a very sweet girl, she's upright and everything and we love her."

A source told UsMagazine.com, "Justin knows how much she loves snowboarding and the mountains, so it was the perfect place."

"This was the basis for getting back together. When they reunited they had a conversation about taking the next step."

The couple - who have dated on-and-off for the past four years - are believed to have then celebrated their engagement with their family and friends at Justin's home in Big Sky, Montana.

Although she has accepted his proposal, "New Year's Eve" star Jessica recently admitted she is in no hurry to walk down the aisle.

She said, "I was never one of those girls who dreamt of my wedding and my Prince Charming. To p**s off my mom, I used to say, 'I'm never having kids, and I'm going to be a fabulously rich old maid living in a house with cute butlers and dogs.'"

Many were probably secretly disheartened when the couple broke up back in March of last year. Well, they're engaged now! Just look at these two!

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