O-Grey Simpson! Ex-NFL Star Showing Significant Signs of Aging in New Mugshot

Simpson, serving time for armed robbery, posed for an updated prison photo.

O.J. Simpson is all smiles as he poses for his latest mug shot.

Read: O.J. Simpson's Former Friend Believes a Murder Confession Is Coming

The photo shows that the 68-year-old former NFL star has gone completely grey, donning his green prison uniform.

The photo was taken by the Nevada Department Of Corrections where Simpson is serving 33 years for armed robbery. He is eligible for parole next year for his 2007 incident, where he broke into a Las Vegas hotel room with a group of armed men to steal sports memorabilia.

The former NFL player’s first mugshot was taken in 1994 when he was arrested for the murder of his ex-wife Nicole Brown Simpson and her friend Ronald Goldman.

Read: From the Gloves to the Bloodied Clothes, What Happened to Evidence in O.J. Simpson's Trial?

He was acquitted of the double murder in 1995.

In 1997, a civil jury ordered the former Heisman Trophy winner to pay $33.5 million in damages after finding him liable for the slayings of his ex-wife and her friend.

Watch: Robert Shapiro Reveals What O.J. Simpson Whispered to Him After The Verdict