Jennifer Garner Gets In a Workout After Her Birthday

Jennifer Garner flashes a big smile while getting out of her car and heading into the gym for a morning workout on Thursday (April 21) in Brentwood, Calif.

The 44-year-old actress just celebrated her birthday over the weekend!

PHOTOS: Check out the latest pics of Jennifer Garner

Jennifer‘s movie Miracles from Heaven is still doing great business after a month in theaters. The film is still in the top ten at the box office and has grossed over $57 million on just a $13 million budget!

15+ pictures inside of Jennifer Garner at the gym…