On Friday, illustrating her proclivity for Twitter, DeGeneres announced in a tweet -- before the Academy issued its own press release -- that she would host the 86th Annual Academy Awards show March 2:
"It's official. I'm hosting the #Oscars!” DeGeneres wrote. “I’d like to thank @TheAcademy, my wife Portia and, oh dear, there goes the orchestra.”
DeGeneres is among the top celebrities in social media. The 55-year-old daytime talk show host boasts more than 21 million followers on Twitter, more than twice as many as NBC's late-night comedian Jimmy Fallon, and seven times as many as ABC's comedian Jimmy Kimmel.
Last year's Oscars host, Seth MacFarlane, has 4.6 million Twitter followers.
DeGeneres' social media prowess probably was a factor in her selection, advertising executives said. In the last three years, since the emergence of Twitter as a indisputable force, the Academy Awards broadcast has benefited by an uptick in viewership.
ABC executives and advertisers credit the surge in viewership to the prominence of social media. People want to watch the Oscars live so they can participate in the real-time conversation unfolding on Twitter and Facebook.
More than 40 million people watched the Academy Awards telecast last February, according to Nielsen.
The four-plus-hour TV event generated more than 9.5 million comments on social media, said Tom Weeks, senior vice president of LiquidThread, a division of advertising giant Starcom MediaVest Group that specializes in creating cross-platform content for its ad clients.
Twitter trumps other social media in real-time dialogue about TV shows, Weeks said. His firm found that 96% of the conversations about the Oscars in February took place on Twitter. Facebook posts made up 4% of the comments.
"Ellen was a very smart choice," Weeks said in an interview. "She is one of the few entertainers who has a broad demographic appeal -- very much in the vein of Johnny Carson."
DeGeneres' selection also underscores the economics of being nice. The entertainer is particularly popular among the Oscar-friendly audience of women under the age of 30. Young women warm to DeGeneres' upbeat onscreen demeanor, her messages of anti-bullying and segments during her show in which she helps people in need.
She gets high marks for her "E-score" that measures consumers' perceptions of celebrities based on awareness, likability and appeal. DeGeneres scores the highest among recent Oscar hosts for being "most approachable" and "most down to earth."
MacFarlane, the creator of Fox's animated show "Family Guy" and the raunchy movie "Ted," scored highest among recent hosts for "rudeness," Weeks said. MacFarlane outraged some women during this year's award ceremony with what some called misogynistic humor, including his song "We Saw Your Boobs."
Women make up the majority of the audience for the Academy Awards. In advertising circles, the venue is called the "Super Bowl for women."
DeGeneres is expected to tweet throughout next year's telecast, and she might even tap her pint-sized singing and dancing sidekicks -- British cousins Sophia Grace and Rosie -- whom DeGeneres discovered on YouTube. DeGeneres' show's YouTube channel has 6 million subscribers.