McDonald's Corp. dismissed Chief Executive Steve Easterbrook over a recent consensual relationship with an employee, which the board determined violated company policy, the fast-food giant said on Sunday.

The board found that Easterbrook, 52, who had led McDonald's since 2015, had "demonstrated poor judgment" involving the relationship, McDonald's said in a news release. Easterbrook relinquished his seat on the company's board as well.

"This was a mistake," Easterbrook said of the relationship in an email to employees on Sunday released by the company. "Given the values of the company, I agree with the board that it is time for me to move on."