I can exclusively reveal that the couple of about two years have called it quits.
Whether or not it's permanent is anyone's guess right now, but Waterhouse, 23, did attend the Oscars just last month with Cooper, 40, who was nominated for his work in American Sniper. (His mom was also with them.)
The lovebirds were first linked in March 2013 when they were spotted together in Boston.
They made their Hollywood debut as a couple after nine months of dating when the British model-actress was Cooper's date to the New York premiere of American Hustle in December 2013.
About a month later, he brought her to the Screen Actors Guild Awards in L.A.