Walker died in a fiery car crash in November (13) and Diesel has spoken of the bond he and his co-star shared both professionally and personally.
On Saturday (22Mar14) the actor revealed how close Walker had become to his own family in a new message about the loss of his friend and colleague on Facebook.com.
Alongside a picture of Walker with Diesel's brother, also called Paul, the actor writes, "Pablo (Walker) and my mother would have deep conversations... she claimed, that it was no accident that this on-screen duo has come to define brotherhood in Our millennium. You see... the other guy in the photo is also named Paul... and although they look more alike, he is actually my twin brother."
Diesel also thanked fans for their support as Fast & Furious bosses prepare to resume work on the seventh instalment in the film franchise later this month (Mar14).
He adds, "God knows we will need all of you to complete this intense experience called Seven. Though this may be one of the hardest things I have had to do in my career, I can't help but to think... that it will also be the most significant."