IN PHOTOS | Queen's final journey: World leaders like Biden and Trudeau pay tribute at state funeral

Britain and the world said a final goodbye to Queen Elizabeth II at a state funeral Monday that drew presidents and kings, princes and prime ministers — and crowds who massed along the streets of London to honor a monarch whose 70-year reign defined an age.

Queen Elizabeth II is laid to rest on Monday, after a grand state funeral attended by leaders from around the world, and a historic last ceremonial journey through the packed streets of London. (Photo | AP) 

The longest-serving monarch in British history died aged 96 at Balmoral, her Scottish Highland retreat, on September 8 after a year of declining health. (Photo | AP)

The queen's eldest son and successor, King Charles III, 73, led mourners, alongside his three siblings and his heir, Prince William. (Photo | AP)

Prince William and Prince Harry follow a gun carriage carrying the coffin of Queen Elizabeth II during her funeral service in Westminster Abbey in central London. (Photo | AP)

Members of the Royal family follow the coffin of Queen Elizabeth II as it is carried into Westminster Abbey for her funeral in central London. (Photo | AP)

Guests arrive inside Westminster Abbey ahead of The State Funeral of Britain's Queen Elizabeth II. (Photo | AP)

Mounted police officers ride past the Horse Guards building ahead of the State Funeral Service of Britain's Queen Elizabeth II. (Photo | AP)

U.S. President Joe Biden, one of the only world leaders allowed to travel with his own transport, steps out of 'The Beast' at Westminster Abbey. (Photo | AP)

Former British Prime Minister Boris Johnson arrives at Westminster Abbey before the the coffin of Queen Elizabeth II is carried inside for her funeral in central London. (Photo | AP)

Former British prime ministers David Cameron, Theresa May and Boris Johnson arrive at the Westminster Abbey on the day of Queen Elizabeth II funeral, in London. (Photo | AP)

French President Emmanuel Macron and his wife Brigitte enter Westminster Abbey. (Photo | AP)

Former British Prime Minister Gordon Brown walks outside the Westminster Abbey. (Photo | AP)

International heads of state and dignitaries seated for the funeral service of Queen Elizabeth II at Westminster Abbey in central London. (Photo | AP)

New Zealand's Prime Minister Jacinda Ardern arrives at the Westminster Abbey on the day of Queen Elizabeth II funeral, in London. (Photo | AP)

U.S. President Joe Biden and first lady Jill Biden arrive at the Westminster Abbey on the day of Queen Elizabeth II funeral, in London. (Photo | AP)

Former British prime ministers John Major and his wife Norma Major, Tony Blair and his wife Cherie Blair, Gordon Brown and his wife Sarah Brown, David Cameron and his wife Samanatha Cameron arrive for the funeral service of Queen Elizabeth II. (Photo | AP)

Canada's Prime Minister Justin Trudeau arrives at Westminster Abbey before the coffin of Queen Elizabeth II. (Photo | AP)

Britain's Prime Minister Liz Truss arrives at Westminster Abbey before the coffin of Queen Elizabeth II is carried inside for her funeral in central London. (Photo | AP)

King Charles III and Princess Anne arrive at Westminster Abbey for the funeral of Queen Elizabeth II, in London. (Photo | AP)

The crown lies on the coffin of Britain's Queen Elizabeth II as it is carried into the Westminster Abbey. (Photo | AP)

The coffin of Queen Elizabeth II, draped in a Royal Standard and adorned with the Imperial State Crown and the Sovereign's orb and sceptre arrives in Westminster Abbey. (Photo | AP)

Members of the clergy arrive for the State Funeral of Queen Elizabeth II at Westminster Abbey in central London. (Photo | AP)