Charlotte Ronson hosted an event to celebrate the launch of her new cosmetic line, ‘Charlotte Ronson Beauty’ last night with Sephora.

She invited some of her celebrity friends which included Rashida Jones and Nicole Richie.

Rashida opted to wear a look from the designers Fall 2011 collection.

Her ‘back-to-school’ military green look was complete with a red satchel.

Nicole opted for a more sophisticated look.

I would normally say blue velvet is no-no for summer, but there isn’t much of this mini dress to be considered heavy.

Nicole’s blonde hair was teased up into a beehive ponytail.

Black Alejandro Ingelmo woven slingbacks and a selection of rings completed her look.

Charlotte Ronson Beauty will be available exclusively from Sephora this September.

Credit: Style.com & Courtesy of Charlotte Ronson