Kate Bosworth: Alexa Chung for Madewell Launch!

Kate Bosworth and her director beau, Michael Polish, head home after spending the evening at Chateau Marmont on Wednesday (September 21) in Los Angeles.

The 28-year-old Straw Dogs actress celebrated the Alexa Chung for Madewell Fall 2011 collection with Madewell, Alexa, and InStyle magazine!

PHOTOS: Check out the latest pics of Kate Bosworth

Earlier in the week, Kate was spotted taking her pet pooch to the vet for an appointment.

Last week, Kate was in New York City promoting Straw Dogs, making stops at shows including Late Night with Jimmy Fallon!

FYI: Kate is wearing JewelMint‘s Monte Carlo bracelet.