And the group recently topped the Australian streaming charts.
Among its many Australian fans is Monash University student, Susan Alhabsyi.
The 29-year old says her love for K-Pop has prompted her to study Korean.
“The main reason why I started studying Korean was to understand what the lyrics were saying in all these K-Pop songs,” she told SBS News.
“I am a big fan of K-Pop myself and I wanted to understand what they were saying in their videos and all the streams.
“I just wanted to connect with them on a different level.”
Ms Alhabsyi, who has Indonesian heritage, said Korean music introduced her to a whole new world.
“It’s different to Western music,” she said.
“I am able to connect to them on a different level, emotionally, but enjoy the beat as well.”
She is not alone. According to Asian studies academic Dr Thomas Baudinette at MacQuarie University, it’s a growing trend.
“It’s a really fascinating phenomenon”, he said. “There’s a massive attraction to Korean groups.“
“We are seeing young people, but other groups as well, becoming increasingly interested in Korea; its music, its television, music and food.
“And this strong attachment to Korea is then translating to a really strong interest into Korean language.
“In Australian universities we see increased enrolment in Korean language programs.”
According to Dr Baudinette, Australians are also meeting and studying privately to learn the language.
“We are also seeing students reaching out to self-teach, they are doing lessons on their own, they use the internet to learn, they go to meet other Koreans so they can speak Korean with Korean people, and then maybe they share their English with Korean people,” he said.
And while many may think the craze mainly attracts teens or Australians with a Korean heritage, Dr Baudienette says that’s not the case.
It is “fairly evenly spread across the Asian-Australian communities and other communities”, and different age groups, he said, from “teenage girls and boys, to grandparents”.
“It’s a very diverse popular culture in Australia.”
Sevana Ohandjanian, who works for SBS Pop Asia, agrees it’s a big movement.
“K-Pop is really popular in Australia, I don’t think people realise how big the audience is.
“A lot of artists come here every year and have sell-out concerts, so it’s actually kind of huge.”
BTS, she said, has become the face of K-pop in the western world.
“They have just gone on to become more and more popular. They use social media a lot, which is how they spread their message so widely.”
Dr Baudienette said many Australians are drawn to South Korean pop culture and music, BTS in particular, because of its participatory and supportive nature.
“In regards to BTS, they have this message of loving yourself and supporting yourself through hard times and a recognition that being a young person is sometimes really difficult,” he said.
“And the community has taken that message to heart; they support each other, they reach out to each other when they are struggling.”
"I don’t think of this fandom as something that is superficial it’s actually very deep and emotionally very meaningful.”