Petyr Baelish is not a fictional character.
A character ( sometimes known as a fictional character ) is a person or other being in a narrative work of art ( such as a novel , play , television series , or film ) . Petyr Baelish , nicknamed Littlefinger , is a fictional character created by American author George R. R. Martin . He is a prominent non-point of view character in Martin 's award-winning A Song of Ice and Fire series , and a main character in HBO 's adaptation of the series , Game of Thrones , where he is portrayed by Aidan Gillen . In A Storm of Swords , it is revealed that several major plot points have hinged on Baelish 's intrigues , including the framing of Tyrion Lannister for the attempt on Bran Stark 's life , the downfall of Lord Eddard Stark , the deaths of Lord Jon Arryn and King Joffrey Baratheon , and the War of the Five Kings .