Two former Khmer Rouge leaders have been sentenced to life in prison after being found guilty by a UN-backed tribunal of crimes against humanity.
Nuon Chea, 88, and Khieu Samphan, 83, were part of the Maoist regime responsible for an estimated two million deaths in Cambodia in the 1970s.
The Khmer Rouge attempted to create an agrarian society, forcing people out of cities and to work on rural cooperatives.
Many starved or died from overwork, anyone perceived as an enemy was executed.
Khieu Samphan was head of state, and Nuon Chea was Pol Pot's deputy; they are the first top-level leaders to be held accountable for the Khmer Rouge's crimes.
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The Sherlock actor made the comment while he received an award for his humanitarian work.