Pictures of Sienna Miller and Jude Law Looking Serious in London

Sienna Miller and Jude Law were deep in conversation on Thursday while having lunch at a London pub. She was decked out in a pair of summery leather pants, also debuting her new darker hair color and bangs. Sienna and Jude's heart-to-heart meal came shortly after the couple was apparently spotted having a huge argument during a recent evening out at the Shoreditch House. They looked so happy just a few weeks ago at the Costume Institute Gala, so maybe they're just working out a few relationship kinks amid their rumored engagement.