BOLTON boxer Amir Khan said the teenage girl who fled the UK to join the Islamic State terror group has to live with the decision she made ­— and not be allowed back in the UK.

The silver Olympic medallist described Shamima Begum as "arrogant" and showing no remorse for her actions in travelling to Syria at the age of 15 to "support terrorism".

The boxer aired his views on Twitter before it became known that the now 19-year-old Londoner had been stripped of her British citizenship.

He wrote: "You left to support terrorism, now live with it.

"After watching her video she doesn't seem one bit upset and comes across so arrogant. UK isn't your home, stop giving us all a bad name please."

Home Secretary Sajid Javid ordered the teenager be stripped of her citizenship.

Shamima wants to return to the UK with her newly-born child as the so-called caliphate crumbles.

She was part of a trio of girls from Bethnal Green Academy to travel to the war-torn nation to support the terror group in February 2015.

Her family's lawyer, Tasnime Akunjee, has said that the family were "very disappointed" over the move and that they were "considering all legal avenues to challenge this decision".

International law forbids nations from making people stateless by revoking their only citizenship, while government guidance from 2017 states that the Home Secretary has the power to order the deprivation if it would be "conducive to the public good", and as long as they are not left without any citizenship.

The Home Office said such decisions are "not taken lightly" and are carried out "in order to protect this country".

"We do not comment on individual cases, but any decisions to deprive individuals of their citizenship are based on all available evidence and not taken lightly."

On Monday, in an interview with the BBC, Ms Begum compared the Manchester Arena bombing to military strikes on Isis strongholds, calling the terror attack "retaliation".