played by Tom Blyth. 's Josh Andrés Rivera has been cast as Sejanus Plinth, the mentor to a tribute from District 2 and a close friend of young Snow.Jerome Lance will play Marcus, a tribute from the dystopian world’s District 2.Mackenzie Lansing will play Coral, a tribute from District 4.Knox Gibson will play Bobbin, tribute from District 8.Aamer Husain will play Ravinstill, mentor to a tribute from District 11.Ashley Liao will play Clemensia Dovecoat, a close friend of Coriolanus and mentor to a tribute from District 11.As previously announced, 's Rachel Zegler will play Lucy Gray Baird, the impoverished District 12 tribute that Coriolanus is assigned to mentor. Lucy is an orphan and a singer, who wows her mentor and eventually, viewers across Panem, with her impressive voice — before proving in the Games that she's even more cunning than she seems.