Get ready to sweat! We caught up with Oscar-winner Reese Witherspoon on her way to the gym earlier today for a little afternoon workout. That smile on her face always melts our heart!

But while Reese has numerous projects in development, she does have one reason not to smile - Bradley Cooper recently dropped out of This Means War, Ms. Witherspoon's latest comedy, due to scheduling conflicts with The Hangover sequel. And no one's been named yet to replace him! Who'll step in to play Reese's leading man?