The new Twitter CEO has been confirmed as former NBCUniversal exec Linda Yaccarino, an executive with deep ties to the advertising industry.
"I am excited to welcome Linda Yaccarino as the new CEO of Twitter!" Musk wrote in a Friday tweet. He added that Ms Yaccarino "will focus primarily on business operations, while I focus on product design & new technology."
Ms Yaccarino has worked at NBCUniversal for nearly 12 years - with her team generating more than $100 billion in ad sales since 2011, her company bio notes.
According to LinkedIn, Ms Yaccarino previously served as NBC's chair for advertising and client partnerships and as president of cable entertainment and digital advertising sales. Prior to her time with NBC, Ms Yaccarino worked at global entertainment company Turner for almost two decades.
Ms Yaccarino interviewed Musk on a Miami stage last month in front of hundreds of advertisers.
Luring advertisers is critical for Musk and Twitter after many fled in the early months after his takeover of the social media platform, fearing harm to their brands in the ensuing chaos. Musk said in late April that advertisers had returned, but provided no details.
Ms Yaccarino could help restore advertisers' faith in Twitter, ad agency DiGo founder and creative chief Mark DiMassimo said.
He noted that Ms Yaccarino successfully integrated and digitised ad sales at Comcast and NBC - and that her track record of cross-selling ads across different platforms could appeal to Musk as he tries to transform Twitter from a social media company to a bigger media platform.
"If anyone can translate the Musk vision into advantages for marketers she'll be able to do it," Mr DiMassimo said. "Even though there's scepticism and all marketers live in the `show me' state right now with regard to Twitter, if in fact she does go to Twitter this is a powerfully reassuring move."
Musk has long insisted he is not the company's permanent CEO. The Tesla billionaire said in a tweet Thursday that his role will transition to being Twitter's executive chairman and chief technology officer.
In mid-November, just a few weeks after buying the social media platform for $44 billion, he told a Delaware court that he does not want to be the CEO of any company.
More than a month later, he tweeted in December: "I will resign as CEO as soon as I find someone foolish enough to take the job." The pledge came after millions of Twitter users asked him to step down in a Twitter poll the billionaire himself created and promised to abide by.
In February, he told a conference he anticipated finding a CEO for San Francisco-based Twitter "probably toward the end of this year."
Analysts who follow Twitter's business welcomed the news even without knowing who the replacement will be.
"A new CEO is the only way forward for Twitter," said Insider Intelligence analyst Jasmine Enberg.
"The single biggest problem with Twitter's ad business was Elon Musk. As he steps back, Twitter can begin to unravel Musk's personal brand from the company's corporate image and attempt to regain trust among advertisers," Enberg said. "The success of those efforts will depend on who takes over, but it's difficult to imagine that the new CEO could be more controversial or damaging to Twitter's ad business than Musk has been."
Shares of Tesla rose about 2 per cent Thursday after Musk made the announcement. Shareholders of the electric car company have been concerned about how much of his attention is being spent on Twitter.
Last November, Musk was questioned in court about how he splits his time among Tesla and his other companies, including SpaceX and Twitter.
Musk had to testify in the trial in Delaware's Court of Chancery over a shareholder's challenge to his potentially $55 billion compensation plan as CEO of the electric car company.
Musk said he never intended to be CEO of Tesla, and that he didn't want to be chief executive of any other companies either, preferring to see himself as an engineer.
Musk's tenure at Twitter's helm has been chaotic, and he's made various promises and proclamations he's backtracked or never followed up on.
He began his first day firing the company's top executives, followed by roughly 80% of its staff. He's upended the platform's verification system and has scaled back content moderation and safeguards against the spread of misinformation.
