'The Last 3 Years Have Been Some of the Hardest of My Life', Vin Diesel

Vin Diesel and his Fast and Furious co-stars will never forget Paul Walker. The xXx: Return of Xander Cage star opened up to ET's Carly Steel at Brazil Comic-Con on Thursday afterhonoring the third anniversary of his co-star's death on social media earlier this week.

"We've felt the loss," Diesel said of the close-knit cast. "The last three years have been some of the hardest of my life because of losing my brother like that."

The action star also remarked that it felt strange to be in Brazil without Walker.

We all do still miss you #PaulWalker