Cedric Diggory (1977 - June 24, 1995), a fictional character in the Harry Potter series of novels, was the Hufflepuff Quidditch captain and Seeker through Harry's third year of school. Cedric's father is Amos Diggory, who works at the Ministry of Magic; his girlfriend was Cho Chang. Cedric has been described as "the strong, but silent type" and "extremely handsome"; as a character he showed a notable streak for modesty and fairness. He was a very good student and a Prefect for the Hufflepuff House. Cedric's wand is twelve and a quarter inches, made of ash wood and contains a single hair from a male unicorn. Mr Ollivander describes it as 'pleasantly springy'.
Hair colour: Brown
Eye colour: Grey
Parentage: Half-blood or Pure-blood
Allegiance: Hogwarts School, Hufflepuff, decency
Film portrayer: Robert Pattinson
First appearance: Harry Potter and the Prisoner of Azkaban
In Harry Potter and the Prisoner of Azkaban, during Harry's third year, Cedric captained the Hufflepuff Quidditch team which beat Gryffindor when Harry Potter fell off his broom due to the prescence of Dementors. Cedric didn't know this until he caught the Snitch, and he demanded a rematch, but even Oliver Wood, the strict Gryffindor Quidditch captain, said they had won fair and square.
His father Amos Diggory was extremely proud of Cedric for "defeating" Harry Potter, saying that the better man won, but Cedric was extremely embarrassed about his father's bragging. The Weasley twins, Fred and George, however, continue to harbour ill feelings towards Diggory for that defeat.
In Harry Potter and the Goblet of Fire, Cedric was selected to be the Hogwarts champion in the Triwizard Tournament. After Harry was mysteriously selected as well, Draco Malfoy made Support Cedric Diggory badges for the Slytherins that could be changed to read Potter stinks.
The above information is courtesy of Wikipedia.org