She’s said to be ‘giddy’ with excitement after a rumoured first date with her DWTS partner Artem Chigvintsev.

And Mischa Barton was certainly in high spirits as she flaunted her beach body in a sultry photoshoot in Los Angeles on Friday.

The O.C. alumni, 30, displayed a hint of cleavage in a dazzling white bikini before slipping into one-shoulder swimsuit and a romantic lace dress.

The blonde beauty was spotted pouting for the camera in the skimpy textured two-piece which featured a daring scooped neckline.

She covered up somewhat in a black and white star-print cardigan and added a jaunty edge to the beachy ensemble with a black fedora.