Rachel Bilson in a sexy red bikini while enjoying a vacation in Barbados

Rachel Bilson really does know how to make boyfriend Hayden Christensen feel special.

The actress paraded around in a sexy red bikini while enjoying a vacation in Barbados with Hayden to celebrate his 30th birthday.

Bilson, 29, looked stunning in the tiny two-piece and spent the day swimming in the Caribbean sea and strolling around the white sandy beach.

Rachel Bilson looked stunning in a tiny red bikini as she enjoyed the sunshine in Barbados today on a trip with boyfriend Hayden Christensen to celebrate his 30th birthday