Hayley McNeff’s death rocked the bodybuilding community over the summer — and TMZ’s learned her cause of death was a drug overdose.

The Massachusetts Executive Office of Public Safety and Security has revealed Hayley’s death was caused by acute intoxication from a deadly mix of heroin, fentanyl, 4-ANPP, cocaine, and norbuprenorphine.

The manner of her death, which occurred back in August, was officially listed as accidental.

She was just 37 years old at the time of her death.

TMZ Sports is going live from the newsroom to discuss the day’s biggest stories … but we don’t just want folks to watch and enjoy the conversation, we want y’all to get involved!!

Hit the comment section as Babcock, Lucas, Mojo and the whole crew break down the most important topics of the day … and we’ll be interacting with viewers throughout the program between 1 and 2 PM PT.

So tune in, make fun of us, share your two cents, sound off about your favorite team … nothing is out of bounds.

It’s Monday and this mighty fine lookin’ couple hit the beach with their rockin’ bods on full display, but can you guess who they are?! Here’s a few clues:

If you don’t know ’em from a popular reality TV show, you definitely have heard of his famous sister … When they’re not in the gym pumpin’ iron, they’re doting parents to their 3 kiddos …