Prison Break and Heroes star Robert Knepper has joined the cast of The Hunger Games: Mockingjay - Part 1 and Part 2, Digital Spy said.

The actor will play the role of President Snow's minister Antonius, a character who doesn't feature in the Suzanne Collins books.

Knepper's casting was announced by Lionsgate on December 11.

The two-part finale of The Hunger Games will be directed by Francis Lawrence. Part 1 will debut on the big screen on November 21, 2014, while Part 2 will follow on November 20, 2015.

The cast of the film recently spoke to Digital Spy about the final franchise instalments.

Director Lawrence said: "The good thing is by splitting it in two you actually will get more of the book in the movies because you have a little more time for each part. There's also room for some surprises and additions."