US citizen Anne Sacoolas will face criminal proceedings in the UK in January charged with causing Harry Dunn's death by dangerous driving.
Sacoolas, 44, will appear via video-link on 18 January, the Crown Prosecution Service (CPS) said.
The teenager died after he was struck by a car Ms Sacoolas was driving outside RAF Croughton in Northamptonshire in August 2019.
She had diplomatic immunity asserted on her behalf by the US government following the collision, and was able to leave the UK 19 days after the incident.
The CPS reached the decision to charge Anne Sacoolas with causing Mr Dunn's death by dangerous driving in December 2019.
“While the challenges and complexity of this case are well known, we remain committed to securing justice in this matter,” a CPS spokesperson said.
“Anne Sacoolas has a right to a fair trial. It is extremely important there should be no reporting, commentary or sharing of information online which could in any way prejudice any proceedings,” they added.
Mr Dunn's mother, Charlotte Charles, told the PA news agency her family were feeling "very emotional" after hearing the news.
She said: “My family and I are feeling very emotional and overwhelmed, having just learned the news that Mrs Sacoolas is now to face our justice system.
“It is all that we asked for following Harry's death.”
Foreign Secretary Liz Truss has welcomed the announcement that Anne Sacoolas is to face criminal proceedings in the UK on charges of causing death by dangerous driving.
Ms Truss tweeted: “Welcome news that Anne Sacoolas will face a UK court. We continue to support the family to get justice for Harry Dunn.”