Police said the dead passenger was aged 79.
A man and woman who were also in the car remain in hospital tonight.
A police spokesman said any witnesses who have not contacted police or anyone with information about events leading to the collision, should call the Essex Police Serious Collision Investigation Unit on 101 or email firstname.lastname@example.org.
A woman has died after a collision involving a car and a lorry on the M11, Essex Police have said.
Motorists have been asked to avoid a section of the motorway linking London with Cambridge after the serious road crash, which happened at around 3.30pm today.
The as-yet unnamed victim, who was a passenger in the car, has died. Two other people who were in the vehicle have been taken to hospital with serious injuries, police said.
Specialist officers are currently at the scene, on the southbound carriageway between junctions six and seven.
"It is a serious collision, and there have been serious injuries.
"A woman who was a passenger in the car has died. Two other people who were in the vehicle have been taken to hospital with serious injuries."
The northbound carriageway has also being closed to allow an air ambulance to land. Drivers are being advised to avoid the area. The road is expected to be at least partially closed until 10pm.
A thief has stolen more than £1,000 worth of heating oil from a hospice in Essex.
It happened last month at the St Clare Hospice in Harlow, which is a local charity offering specialist care for people with life-limiting illnesses.
Police have described the thief as "heartless" and want help to catch him.
Works to improve traffic around the Clock Tower Roundabout in Harlow will start in late July.
The £4.2m works, which will last for a year, are being funded by Essex County Council and the Department for Transport’s Local Pinch Point Fund.
The improvements will ease congestion, improving access to the new Enterprise Zone and Town Centre. Two new slip lanes will be built and other approaches to the roundabout will be widened.
Pedestrian and cycle facilities along with lighting at the Clock Tower Roundabout junction will be also be improved.
Labour's majority on Harlow Council has been cut to just one as UKIP took seats from all parties.
The UK Independence Party has seats on the Essex council for the first time.
Labour won back control of Harlow in 2012 after a decade out of power. The Conservatives controlled the council between 2008 and 2012.
UKIP has gained two seats on Harlow Council in Essex where Labour have an overall majority.
They have taken Staple Tye from the Conservatives and Bush Fair from Labour.
It has emerged that a brother and sister died in yesterday's pile up on the M11 in Essex.
The 53-year-old man from Holland and his 45-year-old sister from Kent were in one of five vehicles involved in the crash on the northbound carriageway near Stansted Airport.
An ITV News viewer recorded this footage of the aftermath of yesterday's M11 crash which claimed the lives of a brother and sister.
Police said the two people killed in a crash on the M11 yesterday were a brother and sister.
The crash happened near junction 8 at Birchanger yesterday afternoon. The dead pair are believed to be a 53-year-old man from the Netherlands and a 45-year-old woman from Kent.
Their family has been informed but they have not been formally identified.
They were in a Toyota car that was struck by other vehicles and collided with the rear of a Mercedes horse box, with five horses on board. The car caught light with the impact. They died at the scene.
Two people were taken to hospital. Their injuries are nor believed to be life threatening.
The driver of a lorry was arrested on suspicion of causing death by dangerous driving. The 49-year-old man from Staffordshire was questioned and later released on police bail until September 15.
Two people have been killed in a motorway pile-up involving a horse box from the famous trainer Brian Meehan's stables.
A man has been arrested on suspicion of causing death by dangerous driving following the crash on the M11 near Harlow.
The trailer carrying five horses collided with three cars and a lorry shortly after 2.15pm in a smash that left the northbound carriageway closed between junctions seven and eight.
Essex Fire and Rescue said it had to free three people trapped in cars.
Two people in a car have died and the driver and passenger in another car have been taken to hospital in Cambridgeshire.
A woman has serious internal injuries and was flown by air ambulance and a man was taken by ambulance with a head injury.
It is not yet clear if they were hurt in the crash or if any of the animals will need to be put down, but the trainer's three intended runners at Newmarket on Thursday evening were withdrawn.
The road remains closed