The Modern Family star joined the likes of Jenna Dewan-Tatum, Laura Carmichael and Lena Dunham while attending the party in Los Angeles, which was held to celebrate women in the entertainment industry.
Gorgeous Sarah showed off her flawless evening style credentials, sporting a pristine white dress complete with cut-out details to showcase her toned waist.
Her glamorous frock also featured a full, voluminous skirt complete with a high-low hemline for an added touch of interest.
In keeping with the all-white theme, the actress wore a pair of futuristic-style strappy heels along with a matching sparkling clutch bag, finishing with diamond earrings and rings that glimmered in the light.
Her caramel blonde hair extensions were swept into a high ponytail and she decorated her peepers with dark glittery eyeshadow along with a dramatic flick of liquid liner.
But she did add a tiny pop of colour to her otherwise neutral ensemble by lacquering her pout a super-bold bubblegum pink hue. Want to get the look? Try MAC Lipstick in Pink Nouveau, £15.50 - it's the perfect candyfloss hue!
What do you think of Sarah's outfit? Let us know by commenting below as the best comment across the site each week wins £50!
Reveal is now on Google Plus! Join us here for the latest pictures, fashion and celebrity news!
Got an iPad or iPhone? Reveal Mag is specially designed to fit!