Justin Timberlake and Jessica Biel were seen kissing at a party in Malibu last week.

The couple arrived at a friend’s birthday party holding hands on April 6.

“If Jessica was talking to a group of girls, Justin would come over, kiss her neck and start making out with her,” says a snitch.

Shortly after Justin split from Cameron Diaz, he and Jessica were seen flirting at Prince’s post-Oscars party and also enjoyed a skiing holiday -but denied they were dating.

The ‘SexyBack’ singer was then seen out with Scarlett Johansson while Jessica went on several dinner dates with her ‘Blade: Trinity’ co-star Ryan Reynolds in February and March.

While Jessica and Justin canoodled at the party, Ryan and Scarlett were enjoying their own romantic dinner date at New York restaurant Odeon.

A source said: “They were definitely together.”