The 51-year-old rap icon shared the news as he appeared at the 2024 NFL Draft in his home city of Detroit, Michigan, on Thursday (25.04.24).
Shady appeared with NFL Commissioner Roger Goodell as they kicked off the Annual Player Selection Meeting.
A trailer circulated of a fake reporter announcing the death of Eminem's alter ego Slim Shady.
They said: "Through his complex and often-criticised, tongue-twisting rhymes, the blonde anti-hero known as Slim Shady has had no shortage of enemies."
His rap peer, 50 Cent, said: "He's not a friend, he's a psychopath."
The reporter continued: "The same rude lyrics and controversial antics may have ultimately led to his demise. Join me as we recreate the events that led to the murder of Slim Shady."
Eminem shared the clip on Instagram along with the album's title and summer 2024 release window.
Shady's last album was 2020's 'Music to Be Murdered By'.
Meanwhile, Eminem has just celebrated 16 years of sobriety.
The 'Lose Yourself' hitmaker marked the milestone by sharing a picture showing him holding the 16-year chip he received from his support group in a post on Instagram.
Eminem - real name Marshall Mathers - chose not to caption the snap, but he was flooded with messages of congratulations from friends, fans and family including his brother Nathan 'Nate' Mathers, who commented: "Greatest influence and mentor."
Eminem's longtime music manager Paul Rosenberg added: "Sweet 16. So proud of you."
The 'Not Afraid' star - who at one time had "10 drug dealers at one time" and was taking "75 to 80 Valiums" a night - spent years struggling with addiction issues before suffering a near-fatal overdose in 2007, which prompted him to get clean during a stint in rehab.