Aleksander Krupa (born 18 March 1947), often credited as Olek Krupa, is a Polish actor, active in film and television roles and best known for playing villains and/or criminals, such as in Eraser, Blue Streak, Home Alone 3 as Peter Beaupre and The Italian Job as Mashkov. He also notably portrayed a Bosnian Serb general engaged in genocide against Bosnian Muslims in 2001's Behind Enemy Lines and portrayed the President of Russia in 2010's action thriller film Salt. Krupa continued to have minor roles in many Hollywood movies, such as X-Men: First Class, Hidden Figures, and The Fate of the Furious.

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Krupa was born in Rybnik, Poland.^{[citation needed]}

Krupa first appeared in a documentary in 1984 entitled Far from Poland. His film debut was in the 1986 film 9½ Weeks.^{[citation needed]}

He married Noa Ain, a composer and painter.^{[citation needed]} They have one child together named Julia Ain Krupa.^{[citation needed]} After their divorce, they remained friends until her death in 2019.^{[citation needed]}

He was nominated for Gold Derby Awards in the category Ensemble Cast for his movie Hidden Figures in 2017.^{[citation needed]}