Courtney Penniman is a transgender male who made his gender transition from female to male in 2012. Many people grow up with feelings of gender incongruency that lead them to not identify with their assigned gender. This is called gender dysphoria and it is not a mental illness.
Kyle Penniman transitioned from female to male in 2012 with the support of his friends in the Phoenix LGBTQ community. His decision was made after many years struggling with gender dysphoria, a condition where one does not feel congruent with their assigned gender. His gender transition has led to a better acceptance of who he is.