Vin Diesel Posts Touching Tribute to Lost ‘Fast & Furious’ Co-Star Paul Walker

Two days after Paul Walker's death, the star most closely associated with him spoke out about the tragic loss.

On Monday evening, Vin Diesel posted a brief message and an on-set photo of himself and Walker to his over 52 million followers on Facebook:

Vin Diesel's memorial to Paul Walker
Vin Diesel's memorial to Paul Walker

Diesel quotes Scottish poet Thomas Campbell's 1825 work "Hallowed Ground," and refers to Walker by the nickname "Pablo." The bond between Diesel and Walker was obviously strong, as they were in the midst of shooting "Fast & Furious 7," their fifth film together over the course of a dozen years.

[Related: 'Fast and Furious' Stars and Other Celebs React to Paul Walker's Death]

Diesel's "Fast & Furious" co-star Michelle Rodriguez also responded to Walker's untimely death on Monday on Twitter, where she notably also referred to Walker has her "brother":

It seems appropriate that the "Fast" stars would use such familial terminology, since the theme of family bonds recurs throughout the six previous installments of the franchise. Other stars of the racing series, including Dwayne Johnson, Ludacris and Sung Kang, also used the term "brother" when eulogizing Walker on their social network posts.

Like their characters in the movies, Diesel and Walker came from very different backgrounds with outlooks on life that seemed conflicting. In 2009 when the pair reunited for the fourth film, Walker himself said: "Our chemistry is that we don't have any chemistry... He's East Coast and I'm West Coast. We respect each other as human beings and that's about all it takes... We have two totally different approaches to this whole game."

The seventh "Fast & Furious" film was in production for a scheduled July, 2015 release when Walker was killed. Filming has been reportedly delayed, but there has been no official word on when or how it might continue.

The late actor's official Twitter account also posted on Monday afternoon that Walker's family requests those looking to honor his memory can make donations to his charity, Reach Out WorldWide. Walker had attended a fundraiser for the charity before his fatal accident.

[Related: 7 Latest Updates in Aftermath of Paul Walker's Fatal Crash]