Lucius MalfoyLucius Malfoy is a fictional character from the Harry Potter books by J. K. Rowling. Lucius Malfoy is married to Narcissa Black, cousin of Sirius Black and they have a son named Draco Malfoy. Lucius Malfoy was 41 at the time of Harry Potter and the Order of the Phoenix placing his birth at 195/1955
When Lord Voldemort first came to power, Malfoy joined him. When Voldemort fell, the Malfoys claimed they'd been bewitched.
Through giving money to charitable causes, Lucius has become very well connected and frequently uses his influence to further his own ends. At one time, Lucius Malfoy was a school governor.
Warning: Spoilers Follow
Before his son's, and Harry's, second year, he was planning on opening the Chamber of Secrets, using the diary of Tom Riddle. His House-Elf, Dobby, snuck out of the house to warn Harry not to return, but failed.
Malfoy's plan was almost successful, but Harry managed to discover the truth and destroyed the memory of Tom Riddle. Harry also tricked Malfoy into setting Dobby free and Malfoy was sacked as a school governor.
When Lord Voldemort rose again, Malfoy joined him. He was involved in the battle in the Department of Mysteries, and was caught by the Minstry of Magic, and sent to Azkaban. However, the Dementors are leaning towards Voldemort's side, and soon Malfoy may be free again.
In the movie, Malfoy is played Jason Isaacs.