Alan Dye, who has led Apple’s UI design team since 2015, is leaving to join Meta as its chief design officer, Bloomberg reports. He’ll join Meta on December 31st, and Meta is opening a design studio and giving Dye oversight of design for “hardware, software and AI integration for its interfaces,” according to Bloomberg. Dye will report to Meta CTO Andrew Bosworth.

Designer Steve Lemay will replace Dye at Apple, the company confirmed to Bloomberg. “Steve Lemay has played a key role in the design of every major Apple interface since 1999,” CEO Tim Cook told Bloomberg in a statement. “He has always set an extraordinarily high bar for excellence and embodies Apple’s culture of collaboration and creativity.” Following the recent retirement of former COO Jeff Williams, Apple’s design team now reports to Tim Cook.

Apple and Meta didn’t immediately reply to a request for comment.

Dye’s departure is the latest leadership change at Apple, and another one of many top designers who have left the company in the last several years. Williams officially left Apple in November, and the company announced earlier this week that AI chief John Giannandrea would be stepping down. Bloomberg has also reported that chips lead Johnny Srouji is evaluating his future at the company.