Michael Adebolajo has been charged with the murder of Drummer Lee Rigby in Woolwich, south-east London, on May 22.
Michael Adebolajo, 28, of Romford, Essex, was also charged with the attempted murder of two police officers and possession of a firearm.
He has been remanded in custody to appear in Westminster Magistrates Court on Monday.
Michael Adebowale, 22, has already been charged with the soldier’s murder and appeared in court on Thursday.
Michael Adebowale, of Greenwich, south-east London, was remanded in custody and is due to appear at the Old Bailey, London, on Monday.
He was charged after spending six days in hospital, having been shot by police and arrested following the attack on May 22.
Michael Adebolajo, who was also shot and arrested at the scene, was charged after spending nine days in hospital and taken into custody at a south London police station.
Both Michael Adebowale and Michael Adebolajo were filmed and photographed by witnesses following the attack, which took place on a busy street during the afternoon.
Michael Adebolajo has been charged with the murder of Drummer Lee Rigby in Woolwich
On Wednesday, a post-mortem examination found Drummer Lee Rigby, from Middleton, Greater Manchester, died of “multiple incised wounds” after the attack.
Thousands of flowers have been laid at the scene of the killing by members of the public in honor of Drummer Lee Rigby.
The total number of arrests made in connection with the attack stands at 12. So far, eight of those arrested have been bailed and two released without charge.
Meanwhile, far-right and anti-fascist groups have held rival demonstrations in central London amid increased tensions following Drummer Lee Rigby’s murder.
Police said 58 members of Unite Against Fascism had been arrested at a counter-protest sparked by a British National Party demonstration in Westminster. All were arrested for breaches of the Public Order Act.
On Friday, Drummer Lee Rigby’s family appealed for calm after reports of a rise in anti-Muslim incidents following the killing.
In a statement, his family said Lee Rigby would not have wanted his death used to excuse reprisal attacks, and called for people to “show their respect in a peaceful manner”.
MI5 asked Michael Adebolajo if he wanted to work for them about six months before Woolwich attack, his childhood friend Abu Nusaybah has claimed.
During a BBC interview, Abu Nusaybah said his friend Michael Adebolajo – one of two men arrested after Drummer Lee Rigby’s murder in south-east London on Wednesday – had rejected the approach from the security service.
Abu Nusaybah, 31, was arrested at the BBC after giving the interview.
BBC’s Newsnight reporter Richard Watson said after the interview had concluded he left the studio to find officers from the Metropolitan Police counter terrorism unit waiting to arrest Abu Nusaybah.
The Met confirmed Abu Nusaybah had been arrested at 21:30 BST on Friday in relation to suspected terrorism offences and search warrants were being executed at two homes in east London.
The arrest was not directly related to the murder of Drummer Lee Rigby, it said.
Soldier Lee Rigby was killed in front of dozens of people near Woolwich Barracks, where he was based, on Wednesday afternoon.
Michael Adebolajo and Michael Adebowale, who was also arrested at the scene, remain in hospital after being shot by police.
In his Newsnight interview, Abu Nusaybah said he thought “a change” had taken place in his friend after a trip to Kenya last year.
Abu Nusaybah was arrested after a TV interview where he claimed MI5 asked Michael Adebolajo to work for them about 6 months before Woolwich attack
Abu Nusaybah said Michale Adebolajo had told him he travelled there “to study”, but instead, was part of a group rounded up by “Kenyan troops” and interrogated in a prison cell.
During his detention he said he was “beaten quite badly”, Abu Nusaybah said, and in his opinion, his friend had also been subjected to sexual abuse, although he was too “ashamed” to say exactly what happened.
After this, he became withdrawn “and less talkative – he wasn’t his bubbly self”, Abu Nusaybah said, adding: “His mind was somewhere else.”
Abu Nusaybah also said Michael Adebolajo was “stopped” upon his return to the UK from Kenya and was later “followed up by MI5” who were “knocking on his door”.
He was “basically being harassed”, Abu Nusaybah said.
Abu Nusaybah added: “His wording was, <<They are bugging me – they won’t leave me alone.>>
“Initially they wanted to ask him if he knew certain individuals.
“But after him saying that he didn’t know these individuals, what he said was they asked him if he would be interested in working for them.
“He was explicit in that he refused to work for them but he did confirm he didn’t know the individuals.”
Reporter Richard Watson said that, in general terms, it was not out of the ordinary for the security service to approach people for information or even to act as covert sources.
Michael Adebolajo, 28, originally from Romford, east London, and fellow suspect Michael Adebowale, 22, of Greenwich, south-east London, had been known to MI5 for eight years, officials confirmed on Thursday.
Two women, aged 29 and 31, arrested on suspicion of conspiracy to murder, have been released without charge, but a man, 29, remains in custody.
Before the attack about four to eight cases a day were reported to its helpline, but the group said about 150 incidents had been reported in the last few days, including attacks on mosques.
On Friday, Drummer Lee Rigby’s wife Rebecca, the mother of his two-year-old son, said she had been aware of the dangers of her husband serving in countries where there was armed conflict, including Afghanistan, but added: “You don’t expect it to happen when he’s in the UK. You think they’re safe.”
Rebecca Rigby said: “I love Lee and always will. I am proud to be his wife. He was a devoted father to our son Jack and we will both miss him terribly.”
Drummer Lee Rigby’s stepfather, Ian Rigby, said: “We would like to say <<Goodnight Lee, rest in peace our fallen soldier. We love you loads and words cannot describe how loved and sadly missed you will be>>.”
Ian Rigby added that his stepson “adored and cared a lot for his family, he was very much a family man, looking out for his wife, young son Jack, younger sisters, whom in turn they looked up to him”.
It was reported today that MI5 had been monitoring the two fanatics responsible for the slaughter of a young soldier near Woolwich barracks for eight years.
The Security Service is facing an inquiry by MPs amid a raft of devastating revelations about the killers’ known links to Islamist extremism.
One of the suspects – Michael Adebolajo – was so high profile he was photographed outside Paddington Green police station six years ago behind notorious hate preacher Anjem Choudary.
Michael Adebolajo was even intercepted by officials as he attempted to travel to Somalia to fight alongside Islamist terrorists last year.
It also emerged that Michael Adebolajo, 28, was a violent ex-prisoner who was a member of a banned terrorist group.
Incredibly, he was said to have been preaching jihad on the streets of Woolwich earlier this week, only a few hundred yards from where 25-year-old Army Drummer Lee Rigby – a married father – was beh**ded.
As MI5 faced accusations that they let the men slip through the net, British PM David Cameron ordered a full intelligence review by a Westminster committee.
Police chiefs described the counter terrorism investigation, one of the largest in recent history, as “complex and fast-moving”.
Michael Adebolajo and his friend remained under armed guard in separate hospitals being treated for gunshot wounds. They are expected to recover fully.
MI5 had been monitoring the two fanatics responsible for the slaughter of a young soldier near Woolwich barracks for eight years
The second suspect was reported last night by news outlets including Channel 4 News and The Times to be Michael Adebowale, 22, of Greenwich, south-east London.
The victim was named yesterday as Drummer Lee Rigby, a veteran of the Afghanistan war who has a two-year-old son.
The young soldier was run over and ha**ed to death with a meat cleaver and knives near his barracks in Woolwich, South East London.
Minutes later the two Islamists were gunned down by firearms officers after charging towards them in an apparent attempt to kill themselves.
The atrocity triggered a wave of national revulsion as British Prime Minster David Cameron branded it an attack on the British way of life and a “betrayal of Islam”.
PM David Cameron said there was no justification for the attack and the responsibility lay purely with the “sickening individuals” behind it.
He added: “This country will be absolutely resolute in its stand against violent extremism and terror. We will never give in to terror or terrorism in any of its forms.”
The list of questions faced by the authorities was growing fast as evidence of the danger the two men posed to Britain grew.
Sources said both men featured in “a number” of counter terrorism investigations in recent years but were not seen as a “threat to life”.
Yet Michael Adebolajo, who was born in South London but is of Nigerian descent, was linked to Anjem Choudary as long ago as 2003.
The former fitness instructor is believed to have been a member of Al Muhajiroun, which was led by the hate preacher until it was banned by the Government.
Michael Adebolajo was jailed at least once for violence and friends said he was a member of a gang of knife-wielding street robbers in his hometown of Romford, Essex.
Footage showed him standing directly behind Anjem Choudary during a protest outside Paddington Green police station in April 2007.
It is believed he may have also been held by the Met in 2006 after protesting outside the Old Bailey during the trial of four Muslim men.
The defendants were ultimately jailed for their part in protests at the Danish embassy in London against cartoons satirizing the Prophet Muhammad.