Stream The Boy Who Was Born a Girl Online Free – Watch Full Movie from Home at 123Movies. . Jon is a typical teenage boy in all respects except one: he was born a girl. He has now been diagnosed with gender dysphoria, a condition that affects over 100 British children every year, and is embarking on an extraordinary journey of transition. Director Julia Moon follows mother and son through the first three months of Jon's life-changing treatment as the testosterone pushes his female body into male puberty.