'Fast and Furious' Stars and Other Celebs React to Paul Walker's Death

Tweets and Instagram memorials are streaming in over actor Paul Walker's untimely death on Saturday. Soon after the news of his passing was confirmed, some of Walker's "Fast and Furious" co-stars took to social media to share their grief, including Dwayne "the Rock" Johnson, and Lucacris.

UPDATE: Jordana Brewster, who played Walker's love interest and eventual wife in the "Fast" series has tweeted a remembrance:

Ludacris also posted to Instagram with his words of remembrance: "Your humble spirit was felt from the start, wherever you blessed your presence you always left a mark, we were like brothers & our birthdays are only 1 day apart, now You will forever hold a place in all of our hearts @paulwalker legacy will live on forever. R.I.P."

Tyrese, another from the "Fast" crew, seemed utterly distraught, writing, "My heart is hurting so bad no one can make me believe this is real Father God I pray that you send clarity over this cause I just don't understand My heart hurts it's broken no one can convince me that this is real.... Prayer warriors please pray real hard for his only child, his daughter and family... #HeartOfAnAngel13YrsFamilyForeverWeJustCelebreatedYour40thBirthday..... My God... My God... I can't believe I'm writing this."

[Related: Paul Walker Dies in Car Crash at 40]

James Wan, the director of "Fast & Furious 7," expressed his shock and sadness:

Goldie Hawn, Evan Rachel Wood, and James Franco are among other celebrities expressing their heartbreak over social media. Here is what they're saying about the late actor:

Hawn has a special connection to Walker as her longtime partner Kurt Russell is set to appear in the next "Fast" movie.

Alyssa Milano, who appeared with Walker on popular '80s sitcom "Who's the Boss?," offered more than a few tweets about her feelings and also shared a YouTube video of their episode.

[Slideshow: Paul Walker's Most Memorable Roles]

"Twilight" star Kellan Lutz posted a photo along with the message, "Beyond speechless to learn of the tragedy that took the life of the incredible man, Paul Walker, and the other soul who accompanied him."