Walker and Diesel reprise their roles as Brian O'Conner and Dominic Toretto in the new film, which is planned for a May 24 release in the US and UK.
Last week, Diesel posted a promotional photo of Fast & Furious 6 on his Facebook page. The image features Diesel and his character's love interest Letty (Michelle Rodriguez).
He also shared that the film's first trailer will be debuted during the Super Bowl on Sunday, February 3.
In Fast & Furious 6, Brian and Dominic along with their crew once again try to pull off a heist in Europe.
Dwayne Johnson will reprise his role as federal agent Luke Hobbs, who hunted down Brian and Dominic in Fast Five.
Watch Dwayne Johnson talk about Fast & Furious 6 below: