The parents of Harry Dunn have reached a "resolution" in a civil claim for damages with the woman alleged to have killed him, the family's spokesman has said.
Mr Dunn, 19, died when his motorbike was hit by a car said to be driven by US citizen Anne Sacoolas near RAF Croughton, Northamptonshire, in 2019.
She later left the country, claiming diplomatic immunity.
Dunn family spokesman Radd Seiger said the outcome was "a real milestone".
Details of the agreement reached between the parties involved in the civil case have not been disclosed.