Designers, pay heed: when a face isn't plastered all over the social media sphere, it makes that much more of an impact when it appears, unicorn-like, in a campaign. Such is the effect of Hedi Slimane's latest Music Project stills, for which he's tapped none other than '60s and '70s style icon Jane Birkin.

At 69 years old, Birkin may look slightly different from the iconic images her name conjures, but that famous fringe and effortless cool remain.  Wearing the fashion house's Le Smoking jacket and a crisp white shirt, Birkin is as visually arresting as she was in her heyday.

At 69, Jane Birkin has landed her first Saint Laurent campaign

At 69, Jane Birkin has landed her first Saint Laurent campaign

Hedi Slimane, who shot the campaign inside Saint Laurent's couture studios on Rue de l'Université in Paris this month, released the two images on Twitter. Birkin follows in the footseps of Courtney Love, Marianne Faithfull and Joni Mitchell, all who have Saint Laurent Music Project campaigns to their name.

At 69, Jane Birkin has landed her first Saint Laurent campaign