But after Khal was killed off (I'm not sorry if that is a spoiler - it was almost 10 years ago now), Momoa's financial security died along with the leader of the Dothraki tribe.
Speaking to InStyle, the dad-of-two said: "I mean, we were starving after Game of Thrones.
"I couldn't get work. It's very challenging when you have babies and you're completely in debt."
Perhaps even more surprising still is the revelation that he was bullied at school.
The 41-year-old recalled: "I got beat up a lot. Just for being slightly different - it was gnarly.
"I mean, I wore Birkenstocks in middle school, and it was like, 'You are a freak!'"
Of course, the Hawaiian has gone on to play hench DC Comics hero Aquaman, meaning he presumably no longer has to worry about money or being bullied.
The actor is currently in high spirits following the election, having spent recent weeks encouraging his followers to 'vote with love' and unseat Donald Trump.
After the election was called in Biden's favour at the weekend, Momoa shared a number of celebratory posts on Instagram.
In one such post, he wrote: "CHARACTER MATTERS.
"PROUD FATHER TODAY BEING A GOOD PERSON MATTERS LET THE HEALING BEGIN. ALOHA J.
"Ps please leave your comments so I can block you and if you are a trump supporter it's super easy just unfollow me. Kindly f*** off ALOHA J."
In another, he wrote: "PRESIDENT BIDEN and now WE HAVE A BLACK INDIAN FEMALE VICE PRESIDENT SUCK IT TRUMP. f*** you a** hat."
You get the idea - not a big Trump fan.
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