Harry Styles plays a sold-out show at the Aviva Stadium in Dublin tonight but not before he and his girlfriend, actress and director Olivia Wilde, took a dip in the sea in Killiney.

Styles (28) went full Matt Damon and was spotted clutching a Tower Records bag full of what appeared to be Guinness.

He and Wilde were reportedly accompanied by actress Eve Hewson, daughter of U2 front man Bono, down at the popular Vico Baths in Killiney yesterday afternoon.

Fellow swimmers uploaded snaps of the couple onto Twitter, adding to the already numerous shots of the former One Direction star on social media since he arrived in Dublin on Monday.

One fan was so overcome when she spotted Styles and Wilde on the city's busy Wicklow Street on Monday that she burst into tears while another struggled to keep her cool down in Killiney.

The couple were also seen entering SOLE Seafood and Grill restaurant on South William Street

The singer has recently been filming Wilde’s new movie, Don't Worry Darling, which is out this September.