Harriet Wran, daughter of the late former NSW Premier Neville Wran, has been charged with drug possession two years after she was released from jail for her role in the robbery and murder of a Sydney drug dealer.

NSW Police said they stopped Ms Wran at a service station on the Pacific Highway at 1.30am on Wednesday. When they approached, a man ran from the car.

Police searched the vehicle and found laptops, mobile phones, credit cards and a large amount of mail, all of which are alleged to be stolen.

They also found a small amount of what was believed to be prohibited drugs.

Ms Wran was arrested and charged with possessing prohibited drugs, goods in custody and not displaying P plates. She will appear in court next week.

She was released from Silverwater Prison in September 2016 after serving two years in custody.

At the time she said she was still recovering from her ice addiction.

“I thought I’d come over and say hello because I know it’s been a bit of a wait for you too,” Ms Wran told reporters outside the prison in 2016.

“This is not a press conference, I’ve really just come to implore you to understand that I’m still very much in recovery.

“It’s going to be a long process and it’s going to be hard.

I ask you to understand, please, to let me do what I have to do in private.”

Ms Wran had been charged with the murder of Sydney drug dealer Daniel McNulty but that was dropped when she later pleaded guilty to a lesser offence of being an accessory.

In August 2014, Ms Wran went to Mr McNulty’s unit in Redfern with her boyfriend, 35-year-old Michael Lee, and 29-year-old Lloyd Edward Haines.

There was a violent struggle and Lee and Haines stabbed Mr McNulty to death.

Both pleaded guilty to murder, robbery in company causing wounding and grievous bodily harm.

Ms Wran was addicted to ice at the time and talked about her struggles with that and an eating disorder during her trial.

-ABC