 Following the death of Prince Woldemar on the 20 March 1895 and the ascension of Woldemar's brother Alexander, Adolf was appointed to act as regent of Lippe due to Prince Alexander being unable to rule due to a mental illness.He continued to act as regent until 1897 when he was replaced by Count Ernst of Lippe-Biesterfeld.Prince Adolf was married on the 19 November 1890 in Berlin to Princess Viktoria of Prussia.