Why Is Reese Witherspoon's Foot in a Cast?

Credit: Fame Pictures

Who did she kick?!

Newlywed Reese Witherspoon stepped out in L.A. on Mother's Day wearing a soft cast on her left foot.

The 35-year-old actress was accompanied by hubby Jim Toth, 40, and kids Ava, 11, and Deacon, 7. Her rep explained to Us Weekly: "She twisted her ankle and is in a walking cast temporarily. Nothing serious."

Witherspoon is just finishing up her European press tour for Water for Elephants, the 1920s circus film in which she stars alongside Robert Pattinson.

Other than her injured ankle, just how is married life treating Witherspoon? She told Us last month: "It feels great!"