She was one of a group of schoolgirls from London's Bethnal Green neighborhood who went to Syria to marry IS fighters in 2015 at a time when the group's online recruitment program lured many impressionable young people to its self-proclaimed caliphate.
Speaking at the refugee camp in Syria where The Times found her last week, she said: "I don't know what to say".
She was shown a copy of a Home Office letter setting out the action against her.
If Shamima's mother is a Bangladeshi national then the daughter would also be a citizen, Lord Carlile, a former independent reviewer of terrorism legislation, told the BBC.
Given Begum's Bangladeshi heritage, it is speculated that she now reverts to being a sole Bangladesh citizen.
The family said it is concerned about Begum's mental health and characterizes her as having been groomed by Islamic State fighters.
Javid says he is relying on a section of the British Nationality Act 1981, which states that he can take away a person's citizenship "if the Secretary of State is satisfied that deprivation is conducive to the public good".
Robert Halfon, Conservative MP for Harlow and chairman of the Commons Education Committee, backed the Home Office move, tweeting: "Absolutely the right decision from @ukhomeoffice @sajidjavid".
The document, obtained by ITV News, was addressed to the girl's mother and said the decision to revoke the citizenship was made "in light of the circumstances of your daughter".
Her family's lawyer, Tasnime Akunjee, said his clients were "disappointed" by the government's decision and were "considering all legal avenues to challenge the decision".
UK Moves to Strip ISIS Shamima Begum Teen of Citizenship
"I think it's a very unsafe decision, it does create this perception that there is a two-tier system and a system that's frankly racist", Maher told BBC's Newsnight.
In a statement, the Home Office said it would not comment on individual cases.
This undated photo issued by the Metropolitan Police shows Shamima Begum.
Begum has named her newborn, Jerah, in accordance with the wishes of her jihadist husband, Yago Riedijk, a Dutch convert from Arnhem.
Ms Begum has said she does not regret travelling to Syria, however, she said she did not agree with everything the IS group had done.
Alex spoke out after Ms Begum compared the Manchester Arena bombing to military strikes on Isis strongholds, calling the terror attack "retaliation".
The teenager, who said she had had no contact with British officials, added the government should not block her homecoming because she was "just a housewife" while there.
Any challenge is likely to be lengthy and would see her remain in northern Syria for at least two years, according to a former independent reviewer of United Kingdom terrorism legislation.
She told The Times that Kadiza had died after a house was bombed, but the fate of her other friend is still unknown.
Thomas seizes Riviera lead as Woods surges Woods got to 6 under par through seven holes, but he will need to get up and down for a par from 30 feet at the par-5 17th. Although golf has traditionally been more focused on finesse over fitness, this may well come down to a strongman contest.
A civilian named Mushtaq Ahmad Bhat was critically injured in the crossfire and subsequently succumbed to his injuries. Kashmir, divided between India and Pakistan since 1947, is at the heart of the troubled ties between the neighbors.
The Duke and Duchess of Cambridge were making a return to the film awards, having attended previous ceremonies together. Kate Middleton stepped out in London to attend The Royal Foundation's Mental Health in Education conference this week.
Iranian proxies in the region include the Lebanon-based Hezbollah, several terror groups in Gaza, and Shiite militias in Iraq. Pictures on social media showed some people also demonstrating against corruption, unemployment and high prices.
Allegedly, Kylie Jenner has been "in denial for days" and finding the devastating news hard to get her head around. Jordyn has yet to comment on the reports on her social media. "Jordy?! That was Kylie's bestie, her ride or die".
They are pushing to have some of Mr Trudeau's top aides and a number of Liberal MPs appear before Parliament's justice committee. Last week, the Globe and Mail reported that the Prime Minister's Office and government officials attempted to pressure Ms.
Trump centered much of his successful 2016 campaign for the White House on a vow to build the wall and make Mexico pay for it. On Sunday the Illinois Democratic senator Tammy Duckworth told ABC's This Week she believed a resolution would pass.
Fallen trees have been blocking railway lines up and down the nation, including between Fareham and Eastleigh this evening. Flooding disrupted the Edinburgh-Glasgow line via Airdrie, between Easterhouse and Garrowhill in Glasgow.
The Marc Gasol trade made it seem like it was only a matter of time before Mike Conley was going to leave Memphis. Over 470 career games with Toronto (444 starts), the 26-year-old averaged 11.8 points and 8.4 rebounds.
They have fought countless skirmishes along their de facto border, which the United Nations monitors, in the Himalayan region. Any sort of investigation you wish carried out regarding this incident about the involvement of any Pakistani, we are ready.
Checking into Sunday's game with 56 seconds left in the first quarter, Nowitzki needed just 22 seconds to drain a 3-pointer. On the biggest stage of the weekend, here are six moments with Carolina connections during the All-Star Game.
German Foreign Minister Heiko Maas also said Germany had earmarked €5 million ($5.72 million) worth of assistance for Venezuela. Roughly 40 countries around the world have backed Guaido, who swore himself in as president in January.
Livestock will be banned. "American favorites like cheeseburgers and milkshake will become a thing of the past", said Sen. The deal is gaining popularity in the House, where more than 15 percent of representatives have signed on as sponsors.
They called the city on Monday and the major offender animal cruelty unit and animal shelter volunteers arrived on the scene. It is now being transferred to a sanctuary elsewhere in Texas - although the exact location has not been publicly disclosed.
Sexton was forced to admit defeat in his battle to stay in the game, trotting off with a bloodied nose and facial injury. Ireland finished the half strongly though, to ensure that they went to the break with the lead.
Renu Begum, eldest sister of Shamima Begum , 15, holds her sister's photo as she is interviewed by the media at New Scotland Yard. Her family's lawyer, Tasnime Akunjee, said he anticipated she would face criminal proceedings upon any return to the UK.
Karl Lagerfeld with model Stella Tennant backstage at his fall '95 fashion show in Paris pre-weight loss. He had also brushed off questions about his age, telling a DW reporter: "I feel young anyways".
Saudi Arabia and Pakistan are both involved in a months-long push led by Washington aimed at ending the conflict in Afghanistan . Although Pakistan has been accused by India and global communities, while it denied involvement in the attack.
I said, 'There's a f-ing rope around my neck!" "I don't need some MAGA hat as the cherry on top of a racist sundae". Asked why he had taken so long to contact police after the incident he said: "There's a level of pride there".
The Democrat served four terms there, and in his final months in office in 1998 flew again in space on the STS-95 shuttle mission. Six others died and 12 were wounded in the attack by a lone gunman who is now serving seven consecutive life terms in prison.
The trial testimony lasted almost three months and the jurors have were tasked with deciding on 10 separate counts. In 2009, Forbes Magazine put him on its list of the world's richest people, with an estimated $1 billion.
A source told People website that Aniston was " very happy that he showed up" and "they hugged and chatted for a bit". Shortly after, Brad began a relationship with his Mr & Mrs Smith co-star Angelina Jolie , whom he married in 2014.
Patrick Hope , said he intends to introduce articles of impeachment against Fairfax on Monday if Fairfax hasn't resigned by then. In the interview, he was also corrected by CBS anchor Gayle King over his comment equating slaves with indentured servants .