The couple is planning an Aug. 14, 2010, wedding.
Lindsay is the daughter of Jerry and Ruth Christiansen of Le Mars. Joshua is the son of Gary and Robin Dietrich of Mallard.
Lindsay is a 2005 graduate of Le Mars Community High School. She also graduated with an associates of applied science in child care supervision and management from Western Iowa Tech Community College.
Joshua is a 2004 graduate of West Bend-Mallard High School. He plans to attend Western Iowa Tech Community College to complete his associates of applied science degree in landscape management.