The 25-year-old Harry Potter star flaunted her perfect pins in a tiny mini skirt as she arrived at fancy London eatery Chiltern Firehouse.
Emma showcased her toned legs in the eye catching floral number which she paired with a white silk blouse.
Not content with just revealing her limbs, the British beauty also unfastened a few buttons on her shirt to flash a hint of cleavage.
She finished the stylish look with a pair of black Chelsea boots.
In keeping with the rock-star vibe, Emma wore her brunette mane in a side-parted messy style.
Emma emphasised her pretty eyes with lashings of mascara and added a pop of colour with a slick of bright pink lipstick.
A girl celebrating her birthday at the restaurant met her:
and just to top off my birthday celebrations even more EMMA WATSON just hugged me & wished me a happy birthday at Charlten Firehouse— Lottie Brown (@lottieisabellex) June 21, 2015