Sienna Miller Shines In A Periwinkle Keyhole Cut-Out Dress At The ‘Sandman’ Premiere—We’re Speechless!

Sienna Miller made a stunning statement in an elegant blue midi dress at the London Sandman premiere this week! The Wander Darkly star, 40, donned a curve-hugging periwinkle garment that featured ribbed fabric, a central keyhole cut-out, a low-cut neckline and classic bell sleeves. We’re in awe!

Miller’s light blue lurex dress is by Self-Portrait and highlighted her incredible figure with its bow-shaped bodice, shoulder detailing and waist emphasis. The American Sniper actress added white sandal heels and a matching bag to complete her look, and styled her signature long, wavy blonde tresses into an elegant updo for the event. Miller’s gown also featured an open, square back design, drawing eyes to her gorgeous ensemble even more.

Miller graced the BFI Southbank premiere to support her ex of four years, lead actor Tom Sturridge, with whom she shares daughter Marlowe, 10. The designer of her dress for the soiree shared her outfit with their 1.2 million followers in an Instagram post— a photo of Miller posing on the red carpet.

The label wrote, “Sienna Miller in our LIGHT BLUE LUREX KNIT MIDI DRESS at “The Sandman” World Premiere in London,” while garnering thousands of likes and comments from fans in the process.

“Obsessed with this dress!” wrote one fan while another dubbed Miller as the “og fashion killaaaa” with heart-eye emojis. More fans commented that Miller looked “absolutely stunning in blue” and we couldn’t agree more.