Finding love again has put the sparkle back into her life as the starlet – who recently ended her tumultuous relationship with father-of-four Balthasar Getty – was revelling in being the centre of attention at the NY screening.
Ditching her usual boho style for a young Hollywood chic look, Sienna dazzled in a sky blue strapless minidress.
Glittering gold heels and chandelier earrings completed the ensemble.
The actress - who was joined by Renee Zellweger and Melania Trump at the event – spent a week on the sunny Spanish isle with George and her extended family.
She was introduced to the dashing DJ – who goes by the name of Slinky Wizard when he's working the turntables – by her sibling Savannah.
Now happily married with children, Savannah had a brief romance with him seven years ago and thought he'd perfect for her little sister.