Steven Avery, whose life story was portrayed in the Netflix documentary “Making A Murderer” is currently serving a life sentence for the 2005 murder of Wisconsin photographer Teresa Halbach. Avery, who has been behind bars since 2007, and Lynn Hartman say they started a relationship when she wrote to him in January 2016, and now the two are engaged.

WATCH: Steven Avery’s Fiancée Describes The First Time They Met

During Lynn’s exclusive interview with Dr. Phil airing Tuesday, Avery calls her while she’s on Dr. Phil’s stage. In the video above, he tells Dr. Phil what life is like for him in prison, and he has a special message for his bride-to-be.

WATCH: Steven Avery On What He Says About His Future With Fiancée Lynn Hartman

Watch more from this episode here.