It's so hard to say goodbye!
"Universal has been so good to me and so trusting of the vision...they have been like family...I promised the studio I would deliver one last trilogy to end the sage," he wrote.
"My producing partner Neal [Moritz] would love for me to sign off on a director, but this is too special a franchise, so these matters have to be verry carefully handled. To be clear, NO ONE has been offered to help Fast 8 yet...let alone seen a script," Diesel wrote.
Furious 7 still ranks as the fifth highest-grossing film of all time, having earned $1.5 billion worldwide.
Samantha McAllister is a staff writer for Movie Fanatic. Follow her on Twitter.