The murderers yelled "Allahu akbar" and were pinned to the ground by security officers in a violent struggle in the dock of the Old Bailey court as they were sentenced today.
Adebolajo shouted: "That's a lie" as Mr Justice Sweeney told him and his co-defendant they had both been radicalised.
Adebowale then stood and shouted comments about America and Britain before several security guards were forced to restrain him.
Adebolajo then leapt from his seat, screaming "Allahu akbar" as officers attempted to control him.
The victim, Fusilier Rigby's family wept as his killers were wrestled to the ground and ultimately taken down to the cells.