Vin's friend and co-star Paul Walker died half way through shooting the action film. The handsome star tragically passed away in a car accident on November 30 following a promotional event in LA.
Sharing a picture of Paul and his brother on Facebook, Vin wrote: "The other guy in the photo is also named Paul..... And though they look alike, he is actually my twin brother."
The star says how grateful to be able to share his thoughts and feelings on his facebook page, which is like a "sanctuary".
"It has helped in these past few months more than you know... and God knows we will need all of you to complete this intense experience called SEVEN," he adds.
"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."
Vin's touching tribute came as the news broke that producers of the film are considering using CGI and body doubles to complete scenes featuring Paul.
According to New York Daily News, Universal may also use voice effects for Paul's character Brian O'Conner.
It was previously reported that Paul's character would be "retired" rather than killed off in the series of films.