Reese Witherspoon happily rode a horse around the set of Water for Elephants in Ventura, CA, yesterday. Riding apparently runs in the Witherspoon family: Reese and her ex-husband, Ryan Phillippe, reunited to watch their daughter Ava compete in an equestrian competition earlier this month. Reese spent her latest afternoon in front of the cameras with just her animal costar, but she's recently worked alongside Robert Pattinson and Christoph Waltz. Christoph had time off over the weekend, though, in order to celebrate Father's Day with his child. Robert will have a day away from the production as well when he heads into LA for Thursday's big premiere of Eclipse.
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