"Fast and Furious" star Paul Walker is dead after a fiery explosion in Southern California on Saturday. He was 40.
According to TMZ, the actor was in a Porsche in Santa Clarita when the driver lost control of the car and clammed into a pole or tree. The car then burst into flames.
Both Paul and the other person in the vehicle were killed.
A rep for the actor confirmed the news on Walker's official Facebook page.
"It is with a truly heavy heart that we must confirm that Paul Walker passed away today in a tragic car accident while attending a charity event for his organization Reach Out Worldwide. He was a passenger in a friend's car, in which both lost their lives," the post reads.
"Thank you for keeping his family and friends in your prayers during this very difficult time."
Walker leaves behind 15-year-old daughter Meadow.
Almost instantly, stars have been turning to Twitter to offer their condolences for or memories of the actor. We'll keep updating the reactions below as more come in.
FYI: After initially sending us a quote from a Vin Diesel Instagram account, the actor's rep now says the page is a fake. Vin has not yet released any statement about Walker's death.
Jordana Brewster ("Fast and Furious" costar)
Paul was pure light. I cannot believe he is gone.
The Rock ("Fast and Furious" costar)
All my strength, love & faith to the Walker family during this heartbreaking time. We find our strength.. in his light. Love you brother.
Ludacris ("Fast and Furious" costar)
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.
Jessica Alba ("Into the Blue" costar)
#RIPPaulWalker -he was a lovely person -so sweet and grounded. My heart goes out to his family
Joshua Jackson ("The Skulls" costar)
Damn. Hard to imagine someone so full of life taken so soon. My thoughts go out to your family. RIP Pauly Walker
James Vanderbeek ("Varsity Blues" costar)
Thoughts and prayers tonight are with Paul Walker's friends and family, especially his little girl. So sad. Very heavy heart tonight.
Ali Larter ("Varsity Blues" costar)
So shocked and saddened to hear about the tragic loss of Paul Walker. My love to his family
Rachael Leigh Cook ("She's All That" costar)
Paul was a truly good person in a town of questionable characters...A real life tragedy if there ever was one.
Usher ("She's All That" costar)
RIP Paul Walker…our prayers go out to his family and friends #gone2soon
Ryan Phillippe ("Flags of Our Fathers" costar)
Paul was a good dude. Conscientious & not caught up in Hollywood. He knew there was more to life & lived like it. Nice to know you brotha.
Jamie Bell ("Flags of Our Fathers" costar)
Had the pleasure of meeting Paul when we worked together on Flags Of Our Fathers. My thoughts are with his family & friends. #RIP
#rippaulwalker i was blessed to call you friend and a beautiful light in the world just went out. i love you paul