Twitter will name top shareholder Elon Musk to its board, the tech giant announced Tuesday.
It comes a day after the Tesla CEO disclosed a 9.2% stake in the social media company, worth about $3 billion.
Twitter CEO Parag Agrawal said Musk was a passionate believer and intense critic of the service -- and added he will make the boardroom stronger in the long-term.
Musk in response, said he was looking forward to working with the company.
The appointment may temporarily block chances of an immediate takeover bid from Musk, which some analysts and investors had speculated about.
The company said Musk cannot own more than 14.9% of Twitter's common stock either as an individual shareholder or as a member of a group as long as he is the director of Twitter.
On Monday it was revealed Musk owned 73.5 million Twitter shares.
He will serve as a Class II director with the term due to expire at Twitter's 2024 annual meeting of stockholders.
Twitter shares surged 6% in trading before the opening bell, after closing up over 27% on Monday.
Musk's sudden elevation at Twitter comes weeks after he had said he was looking into building a new social media platform.
The Tesla boss regularly Tweets and has more than 80 million followers on the site.