Steve O'Donnell in 2015
|Alma mater||Harvard University|
|Known for||Late Night with David Letterman, Jimmy Kimmel Live!, The Chris Rock Show, The Bonnie Hunt Show, The Simpsons, Seinfeld|
|Relatives||Mark O'Donnell (twin brother)|
Steve O'Donnell was born in Cleveland, Ohio, and graduated with an A.B. degree from Harvard College in 1976. He also completed graduate studies in American history at Columbia University and the University of North Carolina at Chapel Hill.
O'Donnell worked on Letterman nearly since the show's inception. The Top Ten List was originally created during O'Donnell's time as head writer, and lists were written in collaboration with other staff writers on the show. According to O'Donnell, the Top Ten List was an "almost simultaneous inspiration arriving from staffers Jim Downey, Randy Cohen and Robert "Morty" Morton — largely prompted by the ridiculous 'eligible bachelor' lists in a local New York paper that included the 84-year-old Bill Paley. 'Why, we can put such nonsense together ourselves!' we exclaimed. And we did."  He later co-authored several of the Top-ten books based in the show. During Letterman's final season, O'Donnell wrote and spoke about his time as head writer on the show, and compiled his own list of the show's "top ten" moments for The New York Times.
In addition to his tenure as head writer of Letterman and Kimmel, O'Donnell worked as a writer and producer on The Bonnie Hunt Show, The Dana Carvey Show, Norm Macdonald Live, and Why? with Hannibal Buress on Comedy Central. More recently he has continued his work with Norm Macdonald as a writer on Norm Macdonald Has a Show for Netflix.
He won Primetime Emmy Awards in the "Outstanding Writing in a Variety or Music Program" category on four occasions: for Late Night with David Letterman in 1984, 1986, and 1987 and for The Chris Rock Show in 1998.
In 2017, the Writers Guild of America presented O'Donnell with the Herb Sargent Award for Comedy Excellence. A video appearance from recently retired David Letterman was part of O'Donnell's introduction.
Steve is the identical twin of Mark O'Donnell, the Tony-award-winning co-writer of the Broadway musical Hairspray who died on August 6, 2012. Steve supported his brother by encouraging California voters to vote no on Prop. 8 in 2008.