Justin Timberlake and Jessica Biel have confirmed they are set to marry this summer.

The couple – who have been dating on and off for five years  before getting engaged in December – will reportedly tie the knot at a private estate later this year with Jessica planning to wear a custom made Monique Lhuillier dress.

A source told USmagazine.com: “The big day’s this summer at a private estate. Monique Lhuillier is her number one choice for the dress.”

Despite refusing to confirm their engagement, Jessica showed off her engagement ring at a party in New York earlier this month, with witnesses guessing it could be vintage, a source said: “It wasn’t huge. It looked vintage and might have been custom made.”

Justin, 31, is said to have proposed to the 31-year-old actress last year during a pre-Christmas break in Jackson, Wyoming, after they reunited following a three-month split. A source said at the time: “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.