Rachel Bilson in a Bikini and Hayden Christensen Shirtless in Barbados

Rachel Bilson and Hayden Christensen left NYC this morning after yesterday's debut of her Karl Lagerfeld-directed Magnum ice cream commercial at the Tribeca Film Festival. The on-again couple arrived in Barbados a few hours later and headed straight to the beach, where Rachel Bilson slipped into a bikini and Hayden went shirtless for an afternoon dip. The pair have been spotted together numerous times in the past few weeks despite publicly calling off their engagement last Fall. Their relationship may become long distance once again in the coming months, though, if Rachel continues filming her new series, Hart of Dixie, in North Carolina.