Justin Timberlake and Jessica Biel back together?

Justin Timberlake and Jessica Biel have reportedly rekindled their relationship.

The couple - who split in March after four years together - are said to have enjoyed a romantic weekend at a friend's wedding in Steamboat Springs, Colorado, and were "by each other's sides" all night when they spotted at a bar in the town with a group of pals.

An onlooker told RadarOnline.com: "They were being very low key. The bar was packed on Saturday night, as it always is. Justin and Jessica were very much together. Jessica's hair was down, and she is beautiful. Justin was wearing a hat, and was by her side the entire night.

"Their group arrived around 10.30pm, and they stayed until 1am People in the bar definitely knew who they were, but no one bombarded them."

Despite Justin having recently been linked to his 'Friends With Benefits' co-star Mila Kunis, this isn't the first time it has been suggested he's rekindled his former romance with Jessica.

In July, a source said: "They've been quietly seeing each other again. They have been talking the whole time and decided to give it another shot.

"Jessica really wanted to get back together with him and Justin thought single life was not what it's cracked up to be."

Follow Emirates 24|7 on Google News.