Stars and Their Pets: Hilary Duff's Birthday BundleDuff spends her special day in L.A. with sister Haylie and Chihuahua Lola. Plus: Ryan Reynolds brings Baxter to the park in Boston and more

RYAN REYNOLDS

In town to film his new movie R.I.P.D., Reynolds uses his downtime for a game of catch with dog Baxter at Boston's Public Garden on Wednesday.