Kate Walsh Films Grey's Anatomy... or the Spin-Off

Redheaded beauty Kate Walsh, aka Dr. Addison Montgomery, was spotted filming a scene for Grey’s Anatomy… or her Grey’s Anatomy spin-off.

Kate, 39, shot her scene while sitting in a dark red Porsche Speedster on Wednesday in Malibu, Calif.

During a break in filming, Kate sent emails on her Blackberry while walking along Zuma Beach in her Ugg boots.