Celebrity Celebrity Deaths Celebrity Death Tributes Big Bang Theory and Young Sheldon Stars Pay Tribute to 'Legend' Bob Newhart: 'Effortlessly Professional' (Exclusive) "When I got to work with alongside him on TBBT, it was absolutely a dream come true," Mayim Bialik tells PEOPLE of Newhart, who she described as "poised, hilarious and incredibly approachable" By Esme Mazzeo, JP Mangalindan, JP Mangalindan JP Mangalindan is a Senior Writer for TV at PEOPLE. He joined PEOPLE in May 2023. JP's work has previously appeared in publications like Fortune, Business Insider, TechCrunch, GQ, Teen People and Entertainment Weekly. People Editorial Guidelines and Dory Jackson Dory Jackson Dory Jackson is a Staff Editor for PEOPLE's TV News team. Upon joining the brand in March 2021, she has had the opportunity to interview a long list of celebrities, from Kate Hudson to Pierce Brosnan to Billy Porter. She has also helped recap popular TV shows like 'The Real Housewives of Beverly Hills,' 'Sister Wives' and 'Vanderpump Rules.' The New York-based Maryland native graduated from Randolph-Macon College in May 2016 with a focus on Communication Studies and Journalism. She came to PEOPLE in March 2021 after working at a number of major news companies, including Newsweek and Us Weekly. People Editorial Guidelines Published on July 18, 2024 08:23PM EDT Close Bob Newhart as Professor Proton on "The Big Bang Theory". Photo: Darren Michaels/Warner Bros. Entertainment Inc. Stars of The Big Bang Theory and Young Sheldon stars are paying tribute to Bob Newhart after his death. The legendary comedian died on Thursday, July 18 at his home in Los Angeles, Calif. following a series of short illnesses, his publicist Jerry Digney confirmed to PEOPLE. He was 94. His final acting role was playing Professor Proton (whose real name was Arthur Jeffries) on The Big Bang Theory and its prequel spinoff, Young Sheldon, on nine episodes of television between 2013 and 2020. As Professor Proton, Arthur hosted an educational children's science show that Sheldon (Jim Parsons) and Leonard (Johnny Galecki) watched while they were growing up. Arthur was also Sheldon's childhood hero and the two got to meet in a season 6 episode of the show when he and Leonard hired him for what he thought would be a children's party. Instead, the grown men just wanted to hang out with Arthur since he made them want to become scientists. He appeared on six total episodes of the sitcom before making special appearances on its spinoff. L-R: Jim Parsons, Bill Nye, Bob Newhart and Johnny Galecki on 'The Big Bang Theory'. Monty Brinton/CBS via Getty Images Iain Armitage, Judd Apatow and Other Stars Mourn Bob Newhart After His Death: 'Heaven Just Got a Whole Lot Funnier' Following the news of his death on Thursday, cast members from both shows paid tribute to Newhart. The Big Bang Theory's Mayim Bialik reflected on Newhart's impact on her life in an exclusive statement to PEOPLE. "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. When I got to work with alongside him on TBBT, it was absolutely a dream come true," she said. "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 simple don’t see anymore. How he will be missed!" Mayim Bialik (left) and Jim Parsons on 'Big Bang Theory'. Michael Yarish/CBS/Courtesy of Everett Remembering Bob Newhart's Life in Photos Iain Armitage, the star of Young Sheldon, also shared a statement with PEOPLE. “Bob’s Professor Proton was inspiring to Sheldon, and his career as an actor was inspiring to me. He was loved and will be missed," Armitage said. The 16-year-old also paid tribute to Newhart in his Instagram Stories on Thursday. "Thanks for being such an inspiring Professor Proton and such an incredible human being," he wrote in a slide, over a photo of Newhart as Professor Proton. "Thinking of you and all who loved you today." He included a string of broken heart emojis in the slide. Iain Armitage as Sheldon Cooper in 'Young Sheldon'. Bill Inoshita/CBS/Getty Bob Newhart Joked He Wanted The Rock to Play Him in a Biopic Before His Death: 'I Get Mistaken for Him a Lot' TBBT alum Kaley Cuoco, who played Johnny Galecki's love interest Penny, honored Newhart on her Instagram Story. "What a dream it was to witness the genius that was Bob Newhart. He was classy, kind, generous and absolutely hilarious," she wrote over a photo of herself and the Elf star in a scene together on the series. "Every take - every time. Icon forever." Kaley Cuoco on 'The Big Bang Theory'. CHUCK LORRE PRODUCTIONS/WARNER BROS TV Kunal Nayyar, who played astrophysicist Rajesh "Raj" Ramayan Koothrappal on TBBT, wrote over a photo in his Instagram Stories on Thursday: "Professor Proton. Our dearest Bob Newhart. RIP. Miss you forever," The Big Bang Theory's co-creator Bill Prady also wrote a tribute to the late comedian on X (formerly Twitter). "Hard to explain how important Bob Newhart was to every comedian and comedy writer who came after him," he wrote in a post that included a photo of him and the Legally Blonde 2: Red White & Blonde star posing together. "Working with him ever so briefly was one of the greatest joys and honors of my life." Besides Big Bang Theory and Young Sheldon, Newhart had a long list of television and film credits. With more than six decades in show business, the beloved entertainer was most remembered for his roles in the CBS series The Bob Newhart Show, which ran from 1972 to 1978, and Newhart, which ran from 1982 to 1990. He was also known for his deadpan humor, standup comedy and roles in Legally Blonde 2, Elf, ER and the TNT movie The Librarian: The Curse of the Judas Chalice. Never miss a story — sign up for PEOPLE's free daily newsletter to stay up-to-date on the best of what PEOPLE has to offer, from celebrity news to compelling human interest stories. Newhart is survived by his four children, sons Robert and Timothy, and daughters Jennifer and Courtney, as well as 10 grandchildren. His wife Ginnie, whom he wed in 1963, died in April 2023.