Sienna Miller dazzled in a white jumpsuit as Serbia’s Novak Djokovic took on France’s Richard Gasquet at the semi-final in Wimbledon held at the All England Lawn Tennis Club Friday. She channeled old Hollywood glamor and looked refreshing in the tight one-piece during her first appearance. Joining her in the sartorial display were Dame Shirley Bassey, Stella McCartney and Anna Wintour.

Sienna stole the show in her optic-white Galvan jumpsuit. The actress followed the Wimbledon dress code of tennis whites. The elegant outfit was perfectly tailored and flattered her slim physique, Vogue reported. 

The outfit featured a square neckline with cut out notch. It was nipped in waist and the wide leg style accentuated her legs. The ensemble also featured a low-cut back.

The jumpsuit is by the upcoming British brand Galvan, known for its sleek lines and modern take on design. The label launched last year and already has fans in Jennifer Lawrence, Rihanna and Gemma Arterton.

Her tailored one-piece flashed a hint of cleavage and flaunted her toned arms. Oozing old-school glamor, Miller added a pop of color to the outfit with a slick of deep red lipstick and flashed her blue manicure. Her cropped blonde hair was swept to one side in a small ponytail. She accessorized with small earrings and a black leather tote by Alexander McQueen.

The actress teamed up her look with tortoiseshell shades. She wore wedges -- a shoe recently spotted on Rihanna earlier this month. It added height to her slender frame gave a nod to '70s style. 

Meanwhile, former “Spice Girl” Geri Horner also took her seat as she arrived with husband Christian Horner Center Court. Geri was dressed in tennis whites wearing a loose summer dress for the outing. Christian donned a beige suit he teamed with a white shirt and blue-and-white polka-dot tie.

This year Wimbledon courtside style went mainstream with Kate Middleton wearing a red L.K. Bennett dress. Meanwhile, Drake donned his sporting leisure suit. Pippa Middleton and Kim Murray nailed the summer style in floral print dresses in pastel hues.