01/24/2014 at 09:00 AM EST
looked every part a rock star as she kicked off Grammy weekend in L.A.
The star was all smiles Thursday night, her first red-carpet appearance since announcing that she and husband Mike Comrie have decided to separate.
Duff, 26, flaunted her toned gams in a burgundy-and-blue minidress as she walked the carpet solo at Delta Airlines's Grammy Weekend party at Soho House, topping her look with a sharp, asymmetrically cut black blazer and bold lips.
On Jan. 10, Duff announced that she and her hockey-pro husband, 33, were calling it quits after three years of marriage, and Duff's rep told PEOPLE the couple "have mutually decided [upon] an amicable separation. ... They remain best friends and will continue to be in each other's lives."
Duff and Comrie have a 21-month-old son, Luca
, and Duff's rep added that the couple "are dedicated to loving and parenting their amazing son."
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