The One Direction star jetted off to Cabo San Lucas to spend some quality time with his girl, and on Wednesday (11May16), the couple was photographed relaxing in the sun by a private pool at their rented villa.

Louis, wearing a pair of red swimming trunks and a black baseball cap, even treated his lady to a back rub, before the brunette TV star decided to remove her striped bikini top to avoid tan lines.

However, the 21-year-old's topless sunbathing has since landed her in the headlines after she was snapped half-naked.

The paparazzi images also captured 24-year-old Louis happily helping Danielle strip off for the sun-soaked session, while in other pictures, the young couple cavorts on a lounger.

Louis and Danielle's vacation comes weeks after they attended the Coachella music festival in California together last month (Apr16), when the boy band star shared a photo of the pair on his page for the first time.

In the black and white picture Louis planted a kiss on the smiling actress' cheek, and captioned the snap: "Lucky".

The stars began dating late last year (15), but the start of their romance was far from traditional as Louis was preparing to become a first-time father. His one-time ex, Los Angeles-based stylist Briana Jungwirth, gave birth to his son Freddie in January (16).

The singer, who is currently on hiatus from One Direction, has been living in Los Angeles since last year, so he can remain close to his son.