Julianne Hough: Cosmo's Summer Bash with Brother Derek

Julianne Hough leans on big brother Derek at Cosmopolitan’s Summer Bash held at Palihouse on Saturday night (August 10) in West Hollywood, Calif.

The 24-year-old actress wore a chic Camilla and Marc dress with Brian Atwood shoes. She completed her look with a Pluma Italia cuff, Sydney Evans ring and earrings and Rafe clutch.

PHOTOS: Check out the latest pics of Julianne Hough

Julianne is up for a surfboard at tonight’s 2013 Teen Choice Awards. She’s nominated for Choice Movie Actress: Romance for her role in Safe Haven.

15+ pics inside…