United Kingdom, April 18 -- Jennifer Garner has vowed to run "one mile a day" for the next two months to help starving children.

The '13 Going On 30' star - who has Violet, 19, Seraphina, 16, and Samuel, 13, with ex-husband Ben Affleck - took to social media on the day after her 53rd birthday (18.04.25) to reveal that she had once again teamed up with Save the Children to provide those in need with necessities.

Alongside a post on Instagram, she wrote: "Happy birthday to me! As I enter a new year, I feel compelled to do something, to put my feet on the ground for kids

"I have been feeling helpless about the world hunger crisis- millions of children are suffering from acute malnutrition and 16,000 children are at immediate risk of dying...