Michael Adebolajo, 28, and Michael Adebowale, 22, have been found guilty in the Old Bailey of the brutal murder of fusilier Lee Rigby.
They were found not guilty of attempting to murder police officers at the scene of the killing on 22 May 2013
It took the jury of eight women and four men about 90 minutes to return guilty verdicts on the pair.
Adebolajo glared at journalists as he was led to the prison cells and kissed his copy of the Koran. Adebowale did not react to the verdicts.
Sentencing will be in January.
This sick and barbaric murder by two London Muslim converts and Islamic extremists has united the entire nation in condemnation.
Both Adebolajo and Adebowale had been known to the police and security services because of their extremist beliefs but they had not been considered a significant or immediate threat.
Our thoughts are with the family and friends of Lee Rigby.