Amber Heard: 'Three Days to Kill' Star!

Amber Heard checks messages on her phone while walking her dog Pistol on Tuesday (December 18) in Philadelphia, Penn.

Last week, the 26-year-old actress was spotted filming scenes for her upcoming film Paranoia with her co-star Liam Hemsworth.

PHOTOS: Check out the latest pics of Amber Heard

It was recently announced that Amber will be co-starring with Kevin Costner in the upcoming film Three Days to Kill.

Three Days to Kill centers on “a dying Secret Service agent (Costner) who decides to retire in order to reconnect with his estranged family,” but “a woman (Heard) offers him access to an experimental drug that could save his life in exchange for one last assignment.”

10+ pictures inside of Amber Heard taking a stroll with Pistol…