South African writer, painter and human rights activist Breyten Breytenbach has been tapped as one of three judges for the 2013 Griffin Poetry Prize.

Organizers of the prestigious annual poetry honour announced judges for the upcoming edition on Wednesday.

Celebrated writer Breytenbach established the anti-apartheid group Okhela during his exile in Paris in the 1960s — he was unable to return to his country because he had married a French Vietnamese woman, illegal under South African morality laws. He served a seven-year prison sentence when he returned home in the mid-1970s. The award-winning writer is considered one of South Africa's finest living poets.

Joining Breytenbach on the Griffin jury are Chicago-based Canadian poet Suzanne Buffam, noted for her debut poetry collection Past Imperfect, and American poet and teacher Mark Doty, a National Book Award-winner for Fire to Fire: New and Selected Poems and the sole U.S. winner of the U.K.'s T.S. Eliot Prize.

The trio will announce the contenders for the upcoming edition of the Griffin Prize on April 9, 2013. The winners will be announced June 13.

Established by businessman Scott Griffin and first awarded in 2001, the Griffin Prize honours one Canadian and one international poet each year. Organizers describe the honour as the world's richest award for a first-edition single poetry collection written in (or translated into) English.

Past winners have included Ken BabstockDionne BrandAnne Carson, Christian Bok, Paul Muldoon and Karen Solie.