WATCH: Josh Allen astonishes the NFL world with incredible news, celebrating the arrival of his first child with his high school sweetheart.

Emma Ritting, 12, wanted to do something for the birthday of her younger sister, Sophie, 10, who has battled epilepsy since she was 10 months old.

The family loves the Buffalo Bills. Her sister loves quarterback Josh Allen. So Emma decided to invite Josh Allen to attend Sophie’s Allen-themed birthday party. She wrote Allen a letter in late February,While Allen didn’t make the party, he did want to meet Emma and Sophie.

That happened Friday, as shown in a video tweeted by Kate Glaser, the founder of Hope Rises.

As the video shows, Emma and Sophie walk down hallway at Highmark Stadium toward the Bills’ locker room, and Emma explains that is where the Bills get dressed for their games. Emma is wearing a Dion Dawkins jersey, and Sophie has an Allen jersey.

The two turn the corner and hear, “Hi Emma! How are you guys doing?” and see Allen. Their reaction is priceless. Allen signed Sophie’s jersey and provided other souvenirs, and the sisters got to take a photo inside Highmark Stadium.

The video was viewed nearly 130,000 times as of Wednesday afternoon, with many reactions from Bills fans.

Here is a sampling:

I’m so glad he saw this and they were able to meet him. This is so special and I love Josh for always trying to reach out and make a persons day like that ❤️