The 45-year-old rapper surprised everyone when he dropped his latest record 'Kamikaze' out of nowhere this month, and he has broken a 36 year UK Official Chart record which he previously held with 'Mamma Mia' hitmakers Abba.
He joked: "Does this mean I can call myself Sir Eminem?"
In the US it means he is now tied with Garth Brooks and Rolling Stones in fifth on the all-time chart toppers rankings, behind only Elvis Presley (10), Barbara Streisand and Bruce Springsteen (11 each), Jay-Z (14) and The Beatles (19).
Each of his nine Number One albums all debuted in the top spot, and he's now the fourth act of the year - including BTS, Logic and Migos - to have two Number One albums in less than 12 months' time, as this latest success follows 2017's 'Revival'.
The hip hop star - whose real name is Marshall Mathers III - isn't resting on his laurels though, as it was revealed he is already back in the studio working on more fresh material.
Shady Records-signed producer Mr. Porter told Skoglund16 TV: "Right now, he in there working. We doing something else right now, but trust me, we'll get to it.
"I'll tell you this: I wouldn't wanna be [Machine Gun Kelly]. It's great that you took that opportunity and did that, hey, kudos to you, good for you.
"The one thing that I'm worried about . . . You remember when Thanos threw that whole planet at Iron Man? [It will be like that]."
Eminem decided to get back in the studio after Machine Gun Kelly, 28, released his diss track 'Rap Devil' in response to his newly-released song 'Not Alike'.