Sienna Miller Joins Royals at Formula E Gala Dinner in Rome!

Sienna Miller keeps it chic in a colorful gown while attending the 2018 Formula E Cocktail Party in the Italian capital ahead of the first-ever E-Prix in Rome at Casina Valadier on Friday (April 13) in Rome, Italy.

The following day (April 14), the 36-year-old actress went for a more casual look in a jumpsuit at the ABB FIA Formula E CBMM Niobium Rome E-Prix 2018 before going for glam at the FIA Formula E Gala Dinner at Villa Miani.

PHOTOS: Check out the latest pics of Sienna Miller

Earlier this month, Sienna joined Jake Gyllenhaal, Freida Pinto and more at the Cartier Celebrates The Launch Of Santos de Cartier Watch in San Fransisco.