How did Roger Ebert get so famous as a movie critic?

Because he's been working as a film critic for over 40 years now. Ebert's movie reviews are syndicated to more than 200 newspapers in the United States and worldwide by Universal Press Syndicate. He has written more than 15 books, including his annual movie yearbook which is predominantly a collection of his reviews of that year. In 1975, Ebert became the first film critic to win a Pulitzer Prize. His television programs have been widely syndicated and have been nominated for Emmy awards. In February 1995, a section of Chicago's Erie Street near the CBS Studios was renamed Siskel & Ebert Way. In June 2005, Ebert was awarded a star on the Hollywood Walk of Fame. He was the first professional film critic to receive such an award. He has honorary degrees from the University of Colorado, the AFI Conservatory, and the School of the Art Institute of Chicago.

Since 1994, he has written a Great Movies series of individual reviews of what he deems to be the most important films of all time. This list and his associated reviews have now expanded to include over 300 movies. Since 1999, he has hosted the annual Roger Ebert's Film Festival in Champaign, Illinois

The Oprah effect

He also wrote the screenplay for Beyond The Valley of The Dolls.

The Oprah effect

He also wrote the screenplay for Beyond The Valley of The Dolls.