Miley Cyrus’ brother Trace Cyrus shared a heartfelt letter to dad Billy Ray Cyrus on social media, giving a glimpse into the “Achy Breaky Heart” singer’s relationship with his daughter Noah Cyrus.

Singer and actor Billy Ray Cyrus is a proud father of six, but not all of his children are biologically his. Two of them, Brandi and Trace Cyrus, are adopted — a fact that's long been known but recently sparked renewed interest.