Palin got her political start as a council member in Wasilla. Later, she became mayor. Johnston says the show will "send a message to America" about who he really is and what he wants to do with his life.
Johnston and Palin's daughter, Bristol, gained national attention during Palin's vice presidential run in 2008 when news broke that the two teenagers were expecting a baby. Since then, Johnston has posed for Playgirl and has been spotted on the red carpet in Hollywood.
His relationship with Bristol and the rest of the Palins has remained tumultuous since the birth of his son, Tripp. He and Bristol Palin recently broke off a short-lived engagement.
The Associated Press contributed to this report.
