Michael Mann, Josh Brolin and Don Winslow are among the industry insiders paying tribute to Val Kilmer, the veteran star who died April 1 at 65.

You were a smart, challenging, brave, uber-creative firecracker. There's not a lot left of those," Josh Brolin wrote on Instagram ... "That talent only grew greater throughout his life," Coppola ...

Josh Brolin paid tribute to the late actor with a heartwarming post on Instagram. "See ya, pal. I’m going to miss you. You were a smart, challenging, brave ... that talent only grew greater ...

Josh Brolin has led tributes to his "brave" and "uber-creative" friend, Val Kilmer. The screen legend, perhaps best known for his performances in Top Gun and Batman Forever, died at the age of 65 ...

Following the news, actor Josh Brolin paid tribute to his friend on ... You were a smart, challenging, brave, uber-creative firecracker. There's not a lot left of those. I hope to see you up ...

You were a smart, challenging, brave, uber-creative firecracker. There’s not a lot left of those,” Josh Brolin wrote on Instagram ... “That talent only grew greater throughout his life ...

Following the sad news, Brolin took to Instagram to post a photo of himself and Kilmer smiling while on a hike in a forest. "See ya, pal. I'm going to miss you. You were a smart, challenging ...