4-year-old daughter of trainer Gunnar Peterson, who worked with celebrities, diagnosed with AML leukemia.

Personal trainer Gunnar Peterson, who has worked with stars like Jennifer Lopez and Kate Beckinsale, shared on Instagram that his four-year-old daughter, Monroe Vivian Peterson, has been diagnosed with AML leukemia. Monroe's diagnosis came after persistent cough, fever, and bruising on her legs led to hospitalization and the need for chemotherapy and a bone marrow biopsy. Khloe Kardashian and other celebrities have offered support and prayers for the family during this challenging time.