On Thursday, Still posted an inspirational video of him driving Leah to surgery to have a tumor removed from her abdomen.
The post was liked by over 13,000 users on Instagram, and captured a great deal of media attention. Still and Leah's story have inspired Pldgit campaign "Help the Bengals Sack Pediatric Cancer," and has yet to reach its $100,000 goal.
Still regularly posts photos and videos of him and Leah on Instagram, often receiving an overwhelming positive response.
You can look at more inspirational photos of Still and Leah together below.