Jack Gleeson as King Joffrey on "Game of Thrones." Macall B. Polay / HBO "Game of Thrones" author George R.R. Martin and star of the HBO series Kit Harington don't think highly of President Donald Trump.

In a new profile of Harington for Esquire, the two men weighed in on comparisons between the HBO hit fantasy drama and today's politics.

"I think Joffrey is now the king in America," Martin told Esquire. "And he's grown up just as petulant and irrational as he was when he was 13 in the books."

On "Game of Thrones," Joffrey Baratheon, who was played by Jack Gleeson, was believed to be the eldest son of King Robert Baratheon (Mark Addy) and Queen Cersei Lannister (Lena Headey). But in actuality, Joffrey was the result of Cersei's incestuous relationship with her twin brother, Jaime Lannister (Nikolaj Coster-Waldau).

Spoiled, egotistical, vengeful, and sadistic, Joffrey took the throne after Robert's death and all his bad traits became heightened. Responsible for some atrocious acts, Joffrey was regarded as the worst villain on "Thrones" — until murderous Ramsay Bolton (Iwan Rheon) took the title from him.

While Harington — whose heroic "Thrones" character, Jon Snow, was famously brought back from death — told Esquire that he prefers not to speak on politics, he nevertheless made it clear that he doesn't have a high opinion of Trump.

"Mister Donald Trump — I wouldn't call him President, I'll call him Mister," the actor said. "I think this man at the head of your country is a con artist."