After a long battle with leukemia, Emma finally beat the disease. When he heard the news, actor Chris Pratt sent an uplifting message to the young girl, who he met during a visit to the Children’s Hospital Orange County last year.

“Atta girl! You kicked cancer’s butt!!!” wrote Pratt, including a photo of the two with the letter. “Thank you to Children’s Hospital Orange County for setting up an amazing visit and to Emma for my wonderful painting.”

CHOC thanked Pratt for his kind gesture.

“Thank you SO much for visiting our patients! They had a blast. We appreciate your time and please come again soon!”

(h/t E! Online)