Apple on Tuesday named Arthur D. Levinson as the Chairman of the Board.

Levinson has been a co-lead director of Apple’s board since 2005, has served on all three board committees— audit and finance, nominating and corporate governance, and compensation, according to Apple. Levinson will continue to serve on the audit committee, the company said.

“Art has made enormous contributions to Apple since he joined the board in 2000,” said Tim Cook, Apple’s CEO. “He has been our longest serving co-lead director, and his insight and leadership are incredibly valuable to Apple, our employees and our shareholders.”

Cook also announced that Robert Iger, Chief Executive Officer of The Walt Disney Company, will join Apple’s board and serve on the audit committee.