Joshua Dobby appeared at Bromley Magistrates' Court earlier charged with two counts of causing death by dangerous driving.
Makayah McDermott and Rozanne Cooper died after the car crashed in Penge, south-east London on Wednesday.
Three girls were also injured and remain in hospital.
No application for bail was made during the short hearing and Mr Dobby was remanded in custody to appear at the Old Bailey on 30 September
He was also charged with:
More updates on this and other London stories
The Met said the three injured girls - two aged 13 and one aged eight - were related to Makayah and his aunt, who was a 34-year-old hairdresser.
The car struck the group at about 14:05 BST on Lennard Road. It had been pursued by police from nearby Birkbeck Road in Beckenham.
One witness said the car was being followed by two police vehicles when the driver "lost control and ploughed into a family".
The Independent Police Complaints Commission (IPCC) is investigating.
Over the past 10 years, 252 members of the public have died following road traffic incidents involving the police in England and Wales, according to the IPCC.
In London, there were 498 crashes involving a pursuit by Met officers in 2015-16.
Friends and neighbours left floral tributes at the scene of the crash on Thursday.
Family friend Emma Cameron called the news "devastating" and said Ms Cooper was "a genuinely lovely girl".
"She never had a bad word to say about anybody. She was the kindest friendliest warmest person. It's just awful," she added.
Makayah had recently auditioned for a part in a television series.
His agent Sam Brown, managing director of Brown and Mills Entertainment, described Makayah as "an extremely talented young actor" and "joy to be around".
"We cannot express enough our sadness and our thoughts are with the family at this terrible time," she added.
A victim support fund for those injured in the crash on the Gofundme website had raised nearly Â£5,000 by Friday morning.

ActiveQuote's software provides information on specialist health and protection insurance products.
It has won four contracts to operate price comparison sites on behalf of online businesses, such as uSwitch.
The Welsh government will provide Â£600,000 to back the firm.
It was established by Dr Richard Theo who has a PhD in computer networks from Cardiff University.

They were on board an anti-piracy vessel, the Seaman Guard Ohio, which was detained in October, 2013.
They face charges including straying into Indian waters and carrying weapons without permission.
Another British man, Paul Towers from Yorkshire, remains in jail along with the ship's Ukrainian captain.
News of the men's release was confirmed by an international maritime lawyer who is close to the case. He said: "Yes, they are out. Checking in to hotel and looking forward to a beer."
The five men freed on bail were: Billy Irving, 33, of Oban in Argyll, John Armstrong, of Wigton, in Cumbria, Nick Dunn, 28, of Ashington in Northumberland, Ray Tindall, 38, of Chester, and Nicholas Simpson, originally of Cottingham in East Yorkshire.
All of them must remain in India.
Their employer AdvanFort, a maritime security patrol specialist, has always insisted the men were working to provide protection to other ships from pirate attacks.
Nick Dunn's sister Lisa has commented on social media: "After 169 horrific days that Nick Dunn has spent in prison and another five being detained on the ship, I'm over the moon to say that the first hurdle is now cleared ... he's out!"
A 23-year-old man has been remanded in custody following the deaths of a 10-year-old boy and his aunt who were a hit by a car being pursued by police.
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More than 70 jobs are being created by a Cardiff Bay finance firm which acts as an online insurance broker and provides data for price comparison websites.
[NEXT_CONCEPT]
Five British men who were being held on arms charges have been freed on bail from an Indian jail, according to a lawyer close to the case.