According to sources, JT popped the question at a luxury ski resort called the Amangani in Wyoming.
TAKE A LOOK AT JESSICA'S STYLE HIGHS & LOWS
An art gallery in the nearby town of Jackson spread the gossip at the time by writing on Twitter: 'Word on the street is that Justin Timberlake proposed to Jessica Biel at the Amangani last night.'
Now insiders have confirmed to US Weekly magazine that the pair are engaged and that Justin has 'never been happier'.
Another insider told the gossip mag: 'Justin knows how much she loves snowboarding and the mountains, so it was the perfect place.
'He knew it was the right time to propose.'
The gorgeous pair have been dating on-and-off for four years now. They confirmed they'd split in March of this year but have been spotted out and about together on numerous occasions this summer.