Michael E. Keller was born on October 28, 1959. His parents and siblings are not known.
Mike became a Christian at nineteen years old after attending a Seminar in Basic Youth Conflicts.
Mike married Lillie "Suzette" Stembridge on July 25, 1980. 
Mike has eight children: Esther Joy Shrader (5/9/81), Rebekah MacDonald (5/15/83), Daniel Keller (2/6/84), Priscilla Lynn Waller (7/3/86), Anna Renee Duggar (6/23/88), Susanna "Suze" Keller (5/29/92), Nathan Edward Keller (4/23/96), and David Nathaniel Keller (7/98).
Mike and his wife chose to homeschool their children growing up. Reportedly, the children had one fifteen minute meeting with the parents each week to discuss any personal issues they may have had.
Mike's daughter Esther married John Shrader on November 3, 2001. They have twelve children: Enoch (1/17/03), Alatheia (3/13/04), Timothy (8/2/05), Nehemiah (1/20/07), Agape (6/3/08), Elijah (9/28/10), Charis Elisabeth (6/25/11), Sophia Joy (3/6/13), Stephen Lushomo (9/11/14), Isaiah Kasimpe (6/2/16), Caleb (1/2/17), and Joseph (3/8/20).
Mike's daughter Rebekah was married to Joshua MacDonald from August 21, 2004, to May 22, 2015. They had two children, Annabel and Alyssa. Some time after that, Rebekah married Kevin Hunt.
Mike's son Daniel was married to Candice from October 3, 2008 to around 2016. They have one adopted son, Brighton Gabriel (7/14/12).
Mike's daughter Priscilla married David Waller on February 4, 2012. They have five children: Paul William (3/16/13), Davia Lynn (11/12/14), Phillip Andrew (10/19/16), Destiny Faith (10/2/18), and Peter David (5/6/20).
Mike's daughter Anna married Josh Duggar on September 26, 2008. The have six children: Mackynzie Renee (10/8/09), Michael James (6/15/11), Marcus Anthony (6/2/13), Meredith Grace (6/16/15), Mason Garrett (9/12/17), and Maryella Hope (11/27/19).
Mike's daughter Susanna has one daughter, Noelle Brooklyn (1/24/13). She married York Bridges on September 2, 2019.
Mike Keller worked as a welder/fabricator as a young adult. He left this field in 1996.
Prison Chaplain Career
Mike Keller started volunteering at a local juvenile detention center after seeing a need while serving jury duty in 1994. In 1996, he began to pursue full-time ministry work in prisons. He spent months traveling to different churches on deputation. His children often go along to prisons with him as volunteers. He works for Rock of Ages Prison Ministry, Inc.
Mike Keller has suffered from an unknown type of chronic health issue since 1999. In January, 2009, his son-in-law Joshua MacDonald commented that "it's a miracle he can still walk".