Sienna Miller and Jude Law made Friday evening a date night with a trip to the Groucho Club. He was still rocking his Dr. Watson mustache yesterday, when he stepped out near Primrose Hill to watch as the neighborhood's Christmas lights were lit. Jude participated in the holiday tradition along with his kids, Rudy, Rafferty, and Iris, as well as ex-wife Sadie Frost. Sienna, though, skipped out on their family-filled afternoon, since she and Sadie haven't had the smoothest relationship. Jude was able to enjoy a weekend with his loved ones during a break from working on Sherlock Holmes 2, and a new picture from the production shows him in costume alongside Robert Downey Jr. and newcomer Noomi Rapace.