Irina Shayk. Photo: Reuters

The Silver Linings Playbook actor has been spotted several times with the model in recent weeks and though they haven't officially confirmed they are a couple, they're getting serious in private.

Bradley's smitten and has been for a few weeks. He adores Irina and was raving about her to friends Sienna Miller and Madonna at the Met Gala, Grazia magazine quoted a source as saying, reports femalefirst.co.uk.

They were careful not to go on the red carpet together, but while they arrived and left separately, they were officially one another's date, the source added.

They were introduced by mutual friend Leonardo DiCaprio shortly after Cooper split from British model Suki Waterhouse.

Bradley was very taken with Irina when he first saw her at the Oscars in February. He and Suki were on the rocks and, once they'd split, Leonardo introduced him to Irina, the source said.