President Coriolanus Snow is the main antagonist of the Hunger Games trilogy. He is the tyrannical President of Panem (North America after the apocalypse).
He is portrayed by Donald Sutherland.
The Hunger Games
In the film adaptation of The Hunger Games, President Snow is portrayed by veteran actor Donald Sutherland (who also voiced President Stone and Sergeant Major Peasy) and serves as the Bigger Bad/tertiary antagonist of the film as a whole. Unlike in the novel, he appears more often and is given added scenes, but still keeps to the character's role and personality. He is not quite as cruel in the film as is he in the book, as he is shown to care for his granddaughter.
He gives a speech on why they have the Hunger Games. But he first appears fully on a panel to greet the tributes when they arrive in the Capitol, and while the rest smile and are amazed at Katniss and Peeta's flaming entrance, Snow remains silent and uncaring. Most of his other scenes are with the Head Gamemaker, Seneca Crane. Each of them are to discuss Katniss's involvement and keeping Panem in line. One of the more well known is when President Snow reveals the true reason why the Games are held. Hope, which he describes as the only thing stronger then fear. That the Games show the country who dominates them and contains the hope that could lead to the end of his and the Capitol's reign.
Though he admits that he favors Seneca, he doesn't delay to intimidate him and eventually when Seneca allows Katniss and Peeta to live, Snow has him executed by forcing him into a room and making him eat the Nightlock berries, the same berries Katniss and Peeta were going to use to kill themselves.
He is last seen crowning Katniss and Peeta, complimenting Katniss's mockingjay pin, before watching Katniss and Peeta return to District 12 and contemplating on how to kill them.
In The Hunger Games: Catching Fire, again portrayed by Sutherland, he is also the main antagonist of the film (he dons a more active role this time around). He is first shown in the Victor Village talking to and threatening Katniss Everdeen by saying he will kill everyone she loved if she doesn't convince him that her love for Peeta was real during their Victory Tour. He is seen next in the balcony of his mansion complimenting on the victory that Peeta and Katniss achieved during the 74th Hunger Games. Afterwards, he is shown talking to new Head Gamemaker Plutarch Heavensbee on how Katniss was to die. Heavensbee suggested that she was to die in the right way now that she was one of the Capitol (unknown to Snow, the Rebellion). His next scene is where he introduces the 75th Quarter Quell and announces that the tributes are to be the winners of past games including Katniss. Throughout the second half of the film, he (along with Heavensbee) is shown observing the games in his office and sees that Katniss poses a threat to the Capitol.
Sutherland returns for both parts of the film adaptation of The Hunger Games Mockingjay as President Snow. In Mockingjay, President Snow serves as the secondary antagonist as he was ultimately outranked by the true main villain.
In Mockingjay Part 2, Snow is captured and imprisoned. He's tied up to a wall, and is about to be executed by Katniss. Katniss instead shoots and kills Coin for Prim's death. Snow is seen maniacally laughing and coughing up blood. Snow is later found dead, most likely from either choking on his own blood or being crushed by the crowd.