(BTS' Twitter)

Septet K-pop group BTS, or Bangtan Boys, boasts over 3 million followers on Twitter as of Monday.

The group captured a screenshot of their milestone achievement and shared it over social media, to which its fans enthusiastically replied, “Sparta,” in reference to the 2007 US film “300,” in which bare-chested steamy Greeks wage war against each other.

BTS debuted in 2013 with single album “2 Cool 4 Skool.”

By Lim Jeong-yeo (kaylalim@heraldcorp.com)