On Saturday afternoon, actor Paul Walker — best known for his leading role in Universal's Fast and Furious franchise — died in a car accident in Santa Clarita, California. He was 40 years old.

Shortly after TMZ posted a story reporting Walker's death on Saturday night, the actor's PR team confirmed the sad news using Facebook and Twitter:

Since then, many of Walker's Fast and Furious costars have taken to Twitter and Instagram to express their grief and pay tribute:

Vin Diesel:

Jordana Brewster:

Dwayne Johnson:

Gal Gadot:

Tyrese Gibson:


Sung Kang:

Director Justin Lin:

It's unclear how Walker's death will affect the future of the Fast & Furious franchise. Walker was in the process of filming Fast & Furious 7, which is currently slated for release in July 2014.