André, Baron Alen (born in Assent, 25 September 1950) has been a judge on the Constitutional Court of Belgium since 16 March 2001.^[1] He was also an associate professor at KU Leuven, where he taught constitutional law. He has been professor emeritus since 1 October 2015.^[2] Alen obtained a Licentiate in Law in 1973 and became Doctor of Law in 1983, both at this same university. From 9 January 2014 to 1 February 2016, Alen was President of the Constitutional Court.^[1]