Brad Pitt [1] was back on the set of his WWII thriller Allied in London on Friday and was joined by a frizzy-haired Lizzy Caplan. The pair was spotted shooting a scene together and shared a smooch for the cameras. We got a glimpse of Brad and his other costar Marion Cotillard filming with an adorable baby girl back in April [2] when the movie was known as Five Seconds of Silence. Keep reading to see Brad and Lizzy on set, then take a walk down memory lane with Brad's Hollywood dating history [3].