Maurice Seezer (born September 1960 in Dublin) is an Irish musician, whose real name is Maurice Jebidiah Roycroft. He has frequently written and composed songs with Gavin Friday, who he first met through a mutual friend. In 1993, he co-wrote "You Made Me the Thief of Your Heart" along with Friday and Bono, which was performed by Sinéad O'Connor for the Jim Sheridan Academy Award-nominated film In the Name of the Father. He has also contributed to the original soundtracks of numerous other films, such as Disco Pigs, Short Cuts, Romeo and Juliet, The Boxer, Moulin Rouge and In America. Seezer studied at the Royal Academy of Music and Trinity College, Dublin.