Gabriel Byrne is to star as André Sougarret, the real-life engineer who masterminded the rescue of 33 trapped Chilean miners in 2010.
Deadline.com, which broke the news of Byrne's casting, says The 33 is currently filming on location in Colombia and will then move to Chile's Atacama Desert.
Directed by Patricia Riggen, The 33 also stars Antonio Banderas, Juliette Binoche and Rodrigo Santoro.
Byrne can currently be seen in Vikings on RTÉ Two on Sunday nights. He will next be seen in cinemas in Vampire Academy, which opens on Wednesday April 23.