Kaley Cuoco, Jamie Lee Curtis, and Judd Apatow pay tribute to Bob Newhart: 'An icon forever'

After Bob Newhart's death on Thursday, Kaley Cuoco, Jamie Lee Curtis, and Judd Apatow were among the first to pay tribute to the comedy legend.

On Thursday morning, Newhart passed away at his home in Los Angeles due to natural causes after a series of short illnesses. He was 94 years old.

On Instagram, Cuoco shared her dream of witnessing the genius of Bob Newhart, her co-star on "The Big Bang Theory."

He was consistently classy, kind, generous, and hilarious in every take. He will forever be remembered as an icon.

In a different Instagram Story post, Cuoco expressed her gratitude to Bob, stating, "Our dreams have come true thanks to you, and I will always remember you."

Bob Newhart will be missed, as Curtis shared a black and white photo of him on Instagram, writing, "They will be laughing wherever people go when they leave us. God, he was funny!"

The 2023 documentary "Bob and Don: A Love Story" was co-directed by Apatow, showcasing the lifelong bond between Newhart and the late comedy legend Don Rickles.

In a post on X, Apatow wrote that Bob Newhart was the kindest and most hilarious man. He asked Apatow to make a documentary about his friendship with Don Rickles. Apatow was fortunate to spend time with his hero, and Newhart's brilliant comedy and gentle spirit made everyone he encountered happy.

Mark Hamill paid tribute to Bob Newhart on X, posting a throwback photo of the sitcom star and writing, "From his groundbreaking stand-up to his two classic sitcoms he gave us a lifetime of laughter. Truly one-of-a-kind. Thank you Bob Newhart! #RIP"