In an interview with The Hollywood Reporter, Tom Glynn-Carney explained how Aegon's hair was deliberately made short (compared to other Targaryens) in order to show his outsider status and how he really feels about his family. Glynn-Carney said the shorter haircut was a result of a discussion he had with "House of the Dragon" showrunner Miguel Sapochnik. "I was like, 'I don't want him to have long, luscious Targaryen locks, because he hates that.'"
Glynn-Carney noted that this sets Aegon apart from his younger brother, Aemond (Ewan Mitchell), as well as the rest of his family: "Aemond is completely reveling in it. Whereas Aegon just throws it away. He was like, 'Take it off!' He doesn't want to be defined by his family. He hates his family because — in his head — they hate him."
Although Aegon's hair is still blond, his refusal to grow it out to a normal Targareyn length symbolizes how he feels his family views him: as an outsider. Because he feels like he has been rejected by his family, Aegon feels like he wants to reject them in return. His hair is just one of the many ways in which he does this. In fact, if he hadn't been made king, Glynn-Carney fantasizes about what he may have done instead. "He's a very selfish person because he wants to escape. I think if he was a modern-day person, he'd leave his family and go traveling around Australia and grow some dreadlocks."
