Avery and his fiancee, Lynn Hartman, will appear on two episodes of the daytime talk show.

Steven Avery is speaking out.

The convicted killer at the center of the Netflix docuseries Making a Murderer is set to appear on Dr. Phil next month, it was announced Thursday.

Avery will telephone the daytime talk show from behind bars for an episode that will air on Oct. 3 and 4. In addition, Dr. Phil McGraw will have Avery's fiancee, Lynn Hartman, in the studio. The two will discuss their relationship, Avery's life in prison and his hopes for a release.

"The truth is coming out, and sooner or later all the truth will come out," Avery said in the interview.

Avery was convicted in 2007 for the murder of photographer Teresa Halbach and is serving life in prison at the Waupun Correctional Institute in Wisconsin. His nephew, Brendan Dassey, recently saw his own conviction overturned in the same murder case. At the time, Dassey confessed to helping his uncle Steven Avery carry out the rape and murder of Halbach, but attorneys argued that his constitutional rights were violated throughout the investigation. Avery filed an appeal in the case at the beginning of the year, just weeks after Netflix released the entire first season of Making a Murderer.

Before his 2007 conviction, Avery served 18 years in prison on a sexual assault conviction. DNA evidence exonerated him of the crime in 2003, two years before the murder of Halbach.

This will mark Avery's first broadcast interview. He is the latest get for Dr. Phil this season. The longtime talk show host had a three-part interview with Burke Ramsey, the brother of JonBenet Ramsey, ahead of the 20th anniversary of the young beauty queen's murder.

New episodes of Making a Murderer, which recently won four Emmy awards, are in the works at Netflix.