LOS ANGELES (Reuters) - US first lady Michelle Obama will appear on ABC show Extreme Makeover: Home Edition as part of her initiative to support military families, the network said on Tuesday. Michelle Obamas appearance on the show will be shot on Thursday in Fayetteville, North Carolina, and the episode will air in October, said Patrick Preblick, a spokesman for ABC. The first lady is making the appearance as part of her Joining Forces initiative for military families. The episode will focus on 15-year US Navy veteran Barbara Marshall and her family. Michelle Obama and the Extreme Makeover team will help Marshalls mission of assisting homeless veterans by building a new house that will house several families, ABC said in a statement.