Longtime NBCUniversal advertising executive Linda Yaccarino will replace Elon Musk as Twitter’s top boss. 

“I am excited to welcome Linda Yaccarino as the new CEO of Twitter,” Musk tweeted Friday. 

Yaccarino, who served as the global chair for advertising and partnerships at NBC, announced her resignation from NBCUniversal on Friday morning, a day after Musk said that he hired a new, female CEO for the social media platform. He did not name a successor at the time.

The billionaire said in a Thursday tweet that the new CEO would start in about six weeks, and that he will become executive chair and chief technology officer, “overseeing product, software and sysops.”