The big news was publicized on The Tonight Show Starring Jimmy Fallon where the actor was brought in via satellite from his hometown of London.
He explained: 'I was like, "Come on, no way". Really?'" he said. "Looked in the mirror, I checked myself out. I was like, 'Yeah, you are kind of sexy today.' But to be honest, it was just a nice feeling.
Previous year it was country singer Blake Shelton.
Check out the cover photo below...
"I was very tall and skinny", said Elba, who is 6'3".
Hilariously, Elba looked unimpressed with his cover image at first before admitting, "It's unbelievable".
The star appears on the entertainment magazine's most recent cover after being given their annual Sexiest Man title, which was once held by other notably sexy men, including the likes of Bradley Cooper, George Clooney, Brad Pitt, Denzel Washington, Harrison Ford, and Sean Connery. He shortly afterwards tweeted a response, in which he got a little political. But as soon as I could grow a moustache, I was the coolest kid on the block.
He said: "Who'd have thought it!" "But what's even more important is your vote in the midterm elections".
What do you think of Idris Elba being named Sexiest Man Alive by People? "Your vote can make a difference!" he said.
He is also planning a wedding with his fiancee Sabrina Dhowre.
He described himself as a "super doting" dad to his 16-year-old daughter and 4-year-old son. "Grew a mustache, had some muscles, bonkers." he told People magazine.
And now he's been named the Sexiest Man Alive and is tipped to play James, so take that, bullies.