CNN  — 

One comedy giant saluted another this week after the passing of Bob Newhart, who died Thursday morning at the age of 94.

Carol Burnett tweeted a fond farewell to the late star later on Thursday, sharing a black-and-white photo of the pair on a set in 1964.

“I had the great pleasure of working with Bob and being his friend,” Burnett wrote in the caption. “He was as kind and nice as he was funny. He will be missed.”

Tributes poured in from many other collaborators and friends of Newhart, including “Elf” director Jon Favreau.

“Bob Newhart was a comedy icon. His deadpan delivery was so infectious both on and off screen. I am grateful to have known him and will always treasure our collaboration,” Favreau said in a statement shared with CNN on Friday.

Several castmates from “The Big Bang Theory” also shared memories.

Alongside a carousel of photos of the pair, Johnny Galecki wrote on his Instagram, “In one of his last emails to me, Bob requested that I stop telling people he’s a ‘nice guy.’ Though I hate to disobey a hero, I must share that Bob was a wonderful man and I cherished my time with him.”

“Safe passage, my friend,” he added.

Mayim Bialik wrote on her Instagram how as a child, “The Bob Newhart Show” “provided countless hours of enjoyment for me – it constituted some of my earliest training in the art of sitcom.”

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Bob Newhart is photographed at his home in Los Angeles in 2019.
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Newhart was originally an accountant and advertising copywriter. He first rose to fame with his comedy album, 1960's "The Button-Down Mind of Bob Newhart." The album was a phenomenon of its time. It was one of the best-selling albums of the year, and it won multiple Grammy Awards.
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Newhart and singer Nat "King" Cole appear together at the Grammy Awards in 1960. Newhart beat out Cole, Frank Sinatra and Harry Belafonte for album of the year.
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Talk-show host Ed Sullivan pretends to grab Newhart around the neck in 1960.
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Newhart signs autographs in the hallway of the Ambassador Hotel in Los Angeles in 1961.
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Newhart films the 1962 war movie "Hell Is for Heroes."
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Newhart poses as an addled accountant at an adding machine for a promotional photo of "The Bob Newhart Show." The award-winning variety show aired for one season beginning in 1961. The same name was later used for his sitcom that aired in the 1970s.
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Newhart appears in a supermarket sketch during an episode of "The Bob Newhart Show" in 1961.
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Newhart performs on the set of "The Bob Newhart Show."
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Newhart and his wife, Ginnie, laugh together at their home in Los Angeles in 1964.
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Newhart, sporting a crooked mustache, appears with Norman Fell in a scene from the 1970 film "Catch-22."
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Newhart is interviewed by talk-show host Johnny Carson on "The Tonight Show" in 1971.
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In the sitcom "The Bob Newhart Show," Newhart played a Chicago psychologist, Bob Hartley, who ministered to a host of eccentric patients. The show aired from 1972 to 1978.
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Newhart counsels a clown about his problems in a 1972 episode of "The Bob Newhart Show."
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Newhart fishes with television personality Ed McMahon in Cypress Gardens, Florida, in 1972.
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Suzanne Pleshette played Newhart's wife, Emily, in "The Bob Newhart Show."
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Newhart poses in his home office in 1972.
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Newhart sits with Gene Wilder during the making of the TV movie "Thursday's Game" in 1974.
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Newhart takes direction from Dick Martin, right, during a scene for "The Bob Newhart Show" in 1977.
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Newhart, known for mostly playing nice guys, poses as a dour devil with a red cape, pitchfork and horns in 1978.
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Newhart and members of his family attend an Easter Sunday brunch in Los Angeles in 1982. Newhart and his wife, Ginnie, had four children: Robert, Timothy, Jennifer and Courtney.
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Newhart, seated, appears in a scene of the TV sitcom "Newhart" in 1982. He played the role of Vermont innkeeper Dick Loudon, who tried to maintain his sanity while surrounded by comical locals.
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Newhart poses with fellow cast members from the sitcom "Bob," which ran in 1992 and 1993.
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Newhart appears with Will Ferrell in a scene of the 2003 comedy film "Elf."
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Newhart sits with a bronze likeness of Bob Hartley, the character he played in the sitcom "The Bob Newhart Show," at its unveiling in Chicago in 2004.
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Newhart appears on stage with Conan O'Brien during the Primetime Emmy Awards in 2006.
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Newhart, right, appears with Johnny Galecki, center, and Bill Nye in an episode of "The Big Bang Theory" in 2013.
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Newhart poses with an Emmy Award in 2013. He won outstanding guest actor in a comedy series for his role in "The Big Bang Theory."
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Newhart arrives at the Emmy Awards in 2016.

She added that when she worked with Newhart on “Big Bang Theory,” “it was absolutely a dream come true. He was effortlessly professional, poised, hilarious and incredibly approachable. Working with Bob was working in the presence of a true comedy legend – the likes of whom we simply don’t see anymore. How he will be missed!”

Newhart was also honored by film director Paul Feig, who appeared in a 1988 episode of his series “Newhart.”

“And we lose another comedy legend. I had the honor of doing a guest role on Newhart & got to spend the week listening to the great Bob Newhart making us all laugh,” Feig wrote on X. “A brilliant standup & comedic actor, he was truly one of a kind.”

As a sendoff for the late star, CBS –the network where both of Newhart’s popular sitcoms aired – will broadcast a special in his honor, set to air July 22, according to The Hollywood Reporter.