OK magazine reports, The singer, 23, took to the social media app to reach out to his fans, showing them what he was up to in his day-to-day life.
Sat in his room with framed band posters on display, the boyband legend gazed directly into the camera as he pouted for the steamy shot, his hair in disarray as he took the adorable image.
And clearly not afraid to show off his body, Harry Styles' pal left his shirt completely off – revealing his hairy chest and gym-honed torso underneath.
Naturally, One Direction fans were very excited with the sexy shot, with one girl posting an excited photo whilst writing: "Me when Niall posts a topless selfie."
Another wrote on Twitter: "Can we all just take a moment to appreciate Niall’s Snapchat."
It comes just days after the Irish lad publicly praised fellow One Direction star Harry Styles on his new solo career.
Niall, who himself went solo last year, took to Twitter to tell his 21.9 million followers of his pride for Harry’s new song.
After Sign of the Times hit the airwaves, Niall simply wrote: "Love it H."