The selection of the panel which will decide the fate of the two former newspaper executives on charges linked to phone hacking and alleged corrupt payments to public officials began yesterday.
About 80 possible members were reduced to 33 on the first day of the trial at the Old Bailey. They were asked to make sure that they could commit to the full trial.
Mr Justice Saunders told them: "I hope that with the assistance of counsel the case will finish more quickly, but people who sit on it should be prepared for the case to go on that long."
Ms Brooks, 45, of Oxfordshire, and Mr Coulson, 45, from Kent, who were in court, are both accused of conspiracy to intercept communications in the course of their transmission.
They are accused of conspiring with former News of the World head of news Ian Edmondson, 44, the now defunct newspaper's former managing editor Stuart Kuttner, 73, and others to illegally access voicemails between October 3, 2000, and August 9, 2006.
The paper's ex-editor Brooks is also charged with two counts of conspiring with others to commit misconduct in public office, one between January 1, 2004, and January 31, 2012, and the other between February 9, 2006, and October 16, 2008, linked to alleged inappropriate payments to public officials.
She faces another two allegations of conspiracy to pervert the course of justice, one with her former personal assistant Cheryl Carter.
The second count alleges that Ms Brooks, her husband Charles Brooks and former head of security at News International Mark Hanna conspired together and with others between July 15 and July 19, 2011, to pervert the course of justice.
Mr Coulson, who also formerly edited the News of the World, is also facing two allegations he conspired with the tabloid's ex-royal editor Clive Goodman, 56.