Stephanie Anna Charlotte Buhl-Freifrau von und zu Guttenberg is a German activist, public speaker, entrepreneur and author in the field of child abuse and internet education for children and adolescents. She was the former president of the German section of Innocence in Danger and from 2000 to 2023 she was married to the former German Minister of Defence, Karl-Theodor zu Guttenberg.

Karl-Theodor Maria Nikolaus Johann Jacob Philipp Franz Joseph Sylvester Buhl-Freiherr von und zu Guttenberg, known professionally as Karl-Theodor zu Guttenberg, is a German businessman and politician of the Christian Social Union (CSU). He served as a member of the Bundestag from 2002 to 2011, as Secretary-General of the CSU from 2008 to 2009, as Federal Minister for Economics and Technology in 2009 and as Federal Minister of Defence from 2009 to 2011.