Kate Bosworth to Derek Blasberg: Stay Classy!

Kate Bosworth lends her star power to fashion writer Derek Blasberg‘s book launch of “Classy: Exceptional Advice for the Extremely Modern Lady” on Thursday (May 6) at the Missoni boutique in Beverly Hills, Calif.

The 27-year-old actress wore a gorgeous Missoni dress, strappy Louboutin shoes and a Calvin Klein clutch.

Kate, along with model Margherita Missoni and Nicole Richie, hosted the event for the NY Times Bestseller book, which is available on Amazon!

Chloe Sevigny and Tinsley Mortimer helped Derek celebrate his book at Barney’s last month.

Nice escorting skills, Lyle. Ha!

10+ pictures inside of Kate Bosworth on Team Blasberg…