Vin Diesel's Touching Tributes to 'Brother' Paul Walker

Diesel also visited the crash site Monday night, and borrowed a megaphone from one of the sheriffs on the scene to address the crowd.

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

"If my brother were here right now and saw all the love that you're bringing here, if he could see for himself that all of you have showed up to show my brother love at this hard time, that his family gets to see all of you show the love that you've shown Paul – it's going to stay with me forever," he announced. "I just wanted to say thank you. Thank you for coming down here and showing that angel up in heaven how much you appreciate him. It's going to stay with me forever."

According to the Santa Clarita Valley Signal, the site was cleared shortly after 7 p.m. for a private memorial. Universal Studios, which produces the "Fast and Furious" films, reportedly obtained the permit so family and members of the franchises cast and crew could hold a private memorial and mourn together.

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

I'm gonna carry this torch for you brother, with a forced smile on my face and Im gonna open my heart just cause your telling me to.
— Michelle Rodriguez (@MRodOfficial) December 2, 2013

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.

Missing my brother... — Sung Kang (@sungkang) December 1, 2013

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.