Steven Avery, the subject of hit Netflix series "Making A Murderer," finally has a reason to celebrate: he’s getting married.

The 54-year-old is said to have popped the question to legal secretary Lynn Hartman after eight months of dating.

His lawyer Kathleen Zellner confirmed the news in a statement to US Magazine.

“Steven Avery’s engagement to Lynn is one bright spot in an otherwise unbelievably tragic and unfair life story,” she said.

“Cheers to both of them.”

The relationship apparently began with letters and phone calls, progressing to a face-to-face meeting just last week when she visited him in jail.

“She’s going to be my future wife. We’ll be laughing forever,” the convicted murderer told the magazine.

“I’m happy. She treats me decent, she loves me. She’s kind of spoiling me right now. I just want to be happy and enjoy my life. I think I did enough time.”

Avery was charged in November 2005 with sexually assaulting and killing photographer Teresa Halbach, who disappeared that Halloween after travelling to his salvage yard to shoot photos for a car magazine.

Avery and his then 16-year-old nephew, Brendan Dassey, lived on the property. A jury in 2007 convicted Avery of being a party to first-degree intentional homicide and a judge sentenced him to life in prison.

He has always maintained that he was framed for the crime.

Later that year, a separate jury convicted Dassey of being party to first-degree intentional homicide, mutilating a corpse and sexual assault. He, too, was sentenced to life — though his conviction was sensationally overturned this year.

The case has long captivated the public. Just two years before Halbach’s death, Avery had been released from prison after spending 18 years behind bars for rape that a DNA test later showed he didn’t commit.

The creators of the original series "Making A Murderer," which documented the case, are now working on a second season.

This article originally appeared on News.com.au.