Bill Cosby will be spending the next three to 10 years behind prison bars.

The disgraced comedian was found guilty on three counts of indecent aggravated sexual assault, and his sentence was handed down to him this week.

The “Fat Albert” creator and “The Cosby Show” star will also be added to the national sex offender registry. The judge handing down his sentence called the comedian a “sexually violent predator.”

Cosby was accused by multiple women of drugging them and then sexually assaulting them over the course of his decades-long career.

Considering Cosby is 81 years old and has spent decades living in luxury and getting away with his crimes, prison will certainly be a big lifestyle change for him.

A fellow celebrity who has spent time behind bars has now come forward to hand down a warning to Cosby. None other than O.J. Simpson — who was released from prison last year — spoke to TMZ this week and gave the lowdown on how Cosby’s time behind bars will go.

The former football star — and accused murderer — said Cosby will need to keep an eye out for himself in prison because “rapists are frowned upon.”

“I’m sure there will be guys protecting him, but they’re gonna have to put him in protective custody … because it takes one nut, ya know?” Simpson, 71, said.

Simpson himself spent nine years in a Nevada prison for kidnapping and armed robbery. He claims the incident was simply his trying to regain his own property, but he was found guilty anyway. He was arrested in 2007 and convicted in 2008.

Simpson also infamously beat multiple murder charges back in the ’90s. He was accused of murdering his ex-wife and her boyfriend, but was found innocent by a jury after a grueling trial that lasted nearly a year. He was later found guilty in a civil trial.

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“With his health and his age and the nature of the crime, there’s not a warden in this country [who] wants the responsibility of a Bill Cosby,” Simpson continued about Cosby.

The former football star suggested Cosby may not actually belong behind bars.

“I think they should let him do his time under house arrest,” Simpson suggested about the comedian’s punishment.

Cosby will spend his three to 10 years in a Philadelphia prison. The disgraced comedian is now partially blind and suffering from multiple other health problems. It’s unlikely he’ll ever walk out of prison and enjoy the laid-back life O.J. Simpson is somehow now enjoying.

Check out more on Simpson’s post-prison life in the video below: