Sienna Miller rocks bright red lips and trench coat to support Tom Sturridge in Orphans play

Ever the cool girl on the block, Sienna Miller worked the laid-back fashion vibe like only she can as she supported fiancé Tom Sturridge on the first night of his new Broadway play, Orphans.

SEE MORE SIENNA MILLER PICTURES
 
Proving every girl should have a trusty trench coat in her wardrobe, Sienna Miller looked effortlessly chic, wearing her belted failsafe over a blue dress and with black chunky ankle boots. Tousled waves and tomato red lips made her dressed-down look nighttime appropriate, while a heart motif clutch bag added a playful edge.

BLONDE HAIR
 
Sienna Miller joined celebrities including Winona Ryder, Hilaria Baldwin and Debbie Harry to watch Tom Sturridge and Alec Baldwin star in the new play. 

RED LIPSTICK RULES

Watch Sienna Miller talk fashion and style exclusively to InStyle...