Wojciech Juliusz Siemion (30 July 1928 – 24 April 2010) was a Polish stage and film actor. He studied law at the Catholic University in Lublin from 1947 to 1950. At the same time, he attended classes in acting at the local theatre. He enrolled at the State Theatre Academy in Warsaw and after just one month, skipped two years of studies. Upon graduation in 1951 he began acting in several theatres and cabarets including Pod Egidą. In 1983, he became a member of the council of the Patriotic Movement for National Rebirth, and in 1985–1989 served as a member of the Sejm from the Polish United Workers' Party. After the fall of communist regime in Poland, Siemion became a member of the Polish People's Party and served in the regional legislature of the Masovian Voivodeship. Siemion was awarded many cultural and state awards, including the Order of Polonia Restituta.
His only Disney role is Carl Friedricksen from Disney movie Up!.
On 21 April 2010, Siemion was seriously injured in a car accident in Ruszki near Sochaczew. He died three days later in a hospital in Warsaw. He was buried at the Powązki Cemetery in Warsaw.