Paul Walker's 'Fast and the Furious,' 'She's All That' Co-Stars Mourn the Late Actor

It was a shock to fans to find out Saturday that Fast and the Furious star Paul Walker had died following a tragic car accident. But it was even more a shock to co-stars of the late actor, who was filming Fast & Furious 7 at the time of his death.

After fans and famous friends had spent Saturday evening mourning the actor with a steady stream of Twitter tributes, Walker's co-stars joined in, taking to Twitter and Instagram to celebrate the life of the actor who died in California while attending a charity event. Actors from Alyssa Milano, who starred with Walker on one episode of Who's the Boss, and 2 Fast 2 Furious co-star Tyrese Gibson — who posted the above photo to his Instagram account — hopped online to share their thoughts of Walker. Wrote Gibson on Instagram:

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

Read below to see more tributes from Walker's co-stars:

Image: Tyrese Gibson/Instagram