Dara Khosrowshahi has been confirmed as the Chief Executive Officer of Uber.
The new CEO will address the company for the first time on Wednesday.
Khosrowshahi was before now the CEO of Expedia.
His appointment was announced to Uber employees late on Tuesday, two days after the board voted unanimously to offer him the job.
Khosrowshahi announced his acceptance in an email to Expedia staff.
He said: “I have to tell you I am scared.
“This has been one of the toughest decisions of my life.”