Instagram
Gunnar Peterson & Monroe Vivian Peterson
The celeb trainer shared on Instagram that his and Jess Peterson's 4-year-old daughter Monroe Vivian Peterson was recently diagnosed with acute myeloid leukemia, a blood and bone marrow cancer.
Keep reading for all the well-wishes to the Peterson family...
Sammi/AdMedia via ZUMA Wire; Christopher Polk/Getty Images for Gatorade
Khloe Kardashian
"G! Oh my heart!! I am so so so sorry for you and your family!! If there’s something I can say for certain, she’s a warrior just like her mommy and daddy!! G I’m here if you need anything! I love you and your family and im praying for you all!"

