"They are taking a break," an insider tells Us of the split. "It is because of busy schedules."
Anthony, 45, and the 22-year-old British heiress to the Topshop fortune were last seen together on Jan. 26 when they attended the 2014 Grammy Awards in Los Angeles. The couple walked hand-in-hand on the red carpet and were spotted getting awfully cozy once inside the Staples Center auditorium.
Last February, the pair also made it a family affair when the Latin Grammy winner and Green spent the day at Disneyland in Anaheim, Calif., with Anthony and Jennifer Lopez's 5-year-old twins Max and Emme.
Anthony and Lopez, 44, split in July 2011, and have yet to finalize for divorce. (Lopez has been dating dancer-choreographer Casper Smart, 26, since November 2011.) The "You Sang to Me" singer was previously linked to model Shannon De Lima, until their split last January. He also has two children, sons Cristian, 13, and Ryan, 11, with ex-wife and former Miss Universe Dayanara Torres.
Anthony's rep had no comment.