Updated 8:58 PM ET
CHICAGO Roger Ebert had the most-watched thumb in Hollywood.
With a twist of his wrist, the Pulitzer Prize-winning critic rendered decisions that influenced a nation of moviegoers and could sometimes make or break a film.
The heavy-set writer in the horn-rimmed glasses teamed up on television with Gene Siskel to create a format for criticism that proved enormously appealing in its simplicity: uncomplicated reviews that were both intelligent and accessible and didn't talk down to ordinary movie fans.
Ebert, film critic for the Chicago Sun-Times since 1967, died Thursday at the Rehabilitation Institute of Chicago, two days after announcing on his blog that he was undergoing radiation treatment for a recurrence of cancer. He was 70.
"So on this day of reflection I say again, thank you for going on this journey with me. I'll see you at the movies." Ebert wrote Tuesday on his blog.
The Chicago Sun-Times published a tribute to Ebert, that ended with a fitting quote from his memoir "Life Itself: A Memoir": "'Kindness' covers all of my political beliefs. No need to spell them out. I believe that if, at the end, according to our abilities, we have done something to make others a little happier, and something to make ourselves a little happier, that is about the best we can do. To make others less happy is a crime. To make ourselves unhappy is where all crime starts. We must try to contribute joy to the world. That is true no matter what our problems, our health, our circumstances. We must try. I didn't always know this and am happy I lived long enough to find it out."
Despite his wide influence, Ebert considered himself "beneath everything else a fan."
"I have seen untold numbers of movies and forgotten most of them, I hope, but I remember those worth remembering, and they are all on the same shelf in my mind," Ebert wrote in "Life Itself."
After cancer surgeries in 2006, Ebert lost portions of his jaw and the ability to eat, drink and speak. But he went back to writing full time and eventually even returned to television. In addition to his work for the Sun-Times, he became a prolific user of social media, connecting with hundreds of thousands of fans on Facebook and Twitter.
Ebert's thumb pointing up or down was his trademark. It was the main logo of the long-running TV shows Ebert co-hosted, first with Siskel of the rival Chicago Tribune and after Siskel's death in 1999 with Sun-Times colleague Richard Roeper. A "two thumbs-up" accolade was sure to find its way into the advertising for the movie in question.
The nation's best-known movie reviewer "wrote with passion through a real knowledge of film and film history, and in doing so, helped many movies find their audiences," director Steven Spielberg said. His death is "virtually the end of an era, and now the balcony is closed forever."
In early 2011, Ebert launched a new show, "Ebert Presents At the Movies." The show had new hosts and featured Ebert in his own segment, "Roger's Office." He used a chin prosthesis and enlisted voice-over guests or his computer to read his reviews.
Fans admired his courage, but Ebert told The Associated Press that bravery had "little to do with it."
"You play the cards you're dealt," Ebert wrote in an email in January 2011. "What's your choice? I have no pain. I enjoy life, and why should I complain?"
Scott Jordan Harris, a British man who wrote for Ebert's website, said he was moved that the critic lost his voice but "never let that make him silent."
Always modest, Ebert had Midwestern charm but stuck strongly to his belief that critics honestly tell audiences "how better to invest two hours of their lives."
On the air, Ebert and Siskel bickered like an old married couple and openly needled each other. To viewers who had trouble telling them apart, Ebert was known as the fat one with glasses, Siskel as the thin, bald one.
Ebert favored blue sweater vests and khakis. After his surgeries, he switched to black turtlenecks and white, film director-style scarves.
Joining the Sun-Times part-time in 1966, he pursued graduate study at the University of Chicago and got the reviewing job the following year. His reviews were eventually syndicated to several hundred other newspapers, collected in books and repeated on innumerable websites, which would have made him one of the most influential film critics in the nation even without his television fame.
His 1975 Pulitzer for distinguished criticism was the first, and one of only three, given to a film reviewer since the category was created in 1970. In 2005, he received another honor when he became the first critic to have a star on the Hollywood Walk of Fame.
Ebert's breezy and quotable style, as well as his deep understanding of film technique and the business side of the industry, made him an almost instant success.