The son of terror mastermind Osama bin Laden has married the daughter of the lead hijacker of the 9/11 attacks.

In an Interview with The Guardian, the family of the deceased al-Qaeda leader confirmed Hamza bin Laden's married to the daughter of Mohammed Atta.

Atta piloted American Airlines Flight 11, which was the first of the hijackings, into the North Tower of the World Trade Center- killing all 92 onboard and around 1,600 people, including emergency responders, in the tower.

Osama bin Laden's half-brothers told the newspaper that they believe the 29-year-old-son had ascended in rank within al-Qaeda as heir to the command and wants to avenge his father's death.

In May 2011, US Navy SEALs stormed a Pakistan compound where bin Laden was living with three of wives and shot him dead.

Hamza bin Laden (pictured at his wedding), the son of terror mastermind Osama bin Laden has married the daughter of the lead hijacker of the 9/11 attacks Mohammed Atta

Osama bin Laden's half-brothers said they believe the 29-year-old-son had ascended in rank within al-Qaeda as heir to the command and wants to avenge his father's death. In May 2011, US Navy SEALs stormed a Pakistan compound with bin Laden (pictured in undated photo, left and in 1997, right) was living with three of wives and shot him dead

In the interview with the Guardian, bin Laden's mother, Alia Ghanem, said her son was 'engaging' and 'pious' as a young boy but became brainwashed when he went to study at King Abdulaziz University in Jeddah, Saudi Arabia.

'The people at university changed him. He became a different man,' she told the newspaper.

'I would always tell him to stay away from them, and he would never admit to me what he was doing, because he loved me so much.'

Atta (pictured, undated) piloted American Airlines Flight 11, which was the first of the hijackings, into the North Tower of the World Trade Center- killing all 92 onboard and around 1,600 people, including emergency responders, in the tower

His half-brothers, however, believe bin Laden his responsible for his own actions and set his own actions.

'It has been 17 years now [since 9/11] and she remains in denial about Osama,' one of his brother, Ahmad, told The Guardian.

'She loved him so much and refuses to blame him. Instead, she blames those around him. She only knows the good boy side, the side we all saw. She never got to know the jihadist side.'

Both brothers said that when he saw the images of the World Trade Center and Pentagon burning, they 'understood instinctively that it was there brother who was responsible for it'.

Hamza is currently believed to be in Afghanistan where he has become a member of the al-Qaeda terrorist organization under its current leader, Ayman al-Zawah.

'We thought everyone was over this,' bin Laden's other brother, Hassan, told the Guardian.

'Then the next thing I knew, Hamza was saying: "I am going to avenge my father." I don't want to go through that again.

'If Hamza was in front of me now, I would tell him: "God guide you. Think twice about what you are doing. Don't retake the steps of your father. You are entering horrible parts of your soul".'

Hamza has released several audio messages calling for attacks against Western nations and a wish to avenge his father's death. Pictured: Hamza, right, with alleged wreckage of an American helicopter in November 2001

The US State Department added Hamza to its Specially Designated Global Terrorist list last year. Pictured: Hamza, center, with Taliban fighters in Afghanistan in 2001

The US State Department added Hamza to its Specially Designated Global Terrorist list last year.

Individuals on this list are 'foreign persons determined to have committed, or pose a significant risk of committing, acts of terrorism that threaten the security of US nationals or the national security, foreign policy, or economy of the United States'.

Hazma has released several audio messages in which he calls for attacks against the West.

In the first audio message in August 2015, he told his followers to wage jihad against Western cities including Washington, DC; Paris; London and Tel Aviv.

One year later, in July 2016, he released an audio message title 'We Are All Osama' and vowed to attack the US due to American 'oppression of Muslim lands'.

He released a video in May 2017 and called for lone-wolf attacks against Jews and Westerners, particularly Americans