Prince George's procession at the Queen's funeral reminiscent of William

Prince George has held onto his father's hand to walk slowly behind his great-grandmother's coffin as it was carried into Westminster Abbey for her state funeral.

The elder Cambridge children, George, nine, and Princess Charlotte, seven, joined their parents, the Princess and Princess of Wales, for the sad event. Prince Louis, three, has not attended with his family.

George's appearance sparked memories of his father's solemn walk at his mother Princess Diana's funeral 25 years earlier also held at the abbey.

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Prince George, who is second in line to the British throne upon his great-grandmother's death, was dressed in a navy suit and tie, while his sister donned all black and a small broach.

He held his father's hand while Princess Charlotte was lead by her mother.

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The children are clearly moved by the event, mourning the loss of their great-grandmother whom they referred to as "Gan Gan."

Prince George and his siblings haven't been seen since Queen Elizabeth's death on September 8, their parents choosing to shield their young children including Prince Louis, three, from public grief.

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Prince William was just 15 and Prince Harry 12 when their mother died in a Paris car crash, the brothers following their mother's coffin into the same location as Queen Elizabeth, Westminster Abbey.

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Prince Harry was comforted by his uncle, Princess Diana's brother Earl Spencer, at his mother's funeral, as George was consoled by Prince William, glancing up at his father as they made their way to their seats.

Prince George is now second in line to the British throne behind Prince William following Queen Elizabeth's death.

Prince William described walking behind his mother's coffin as "one of the hardest things I've ever done" in the documentary, Diana, 7 Days,

"It felt like she was almost walking along beside us to get us through it," he said.

"People were screaming, people were crying, people's hands were wet because of the tears they'd just wiped away from their face before shaking my hand.

"It was so unusual for people to see young boys like that not crying when everybody else was crying...What we were doing was being asked of us was verging on normal then, but now… Looking at us then, we must have been in just this state of shock."

"We didn't really talk about it that much," said Prince William, "It was 'Right, here we go again. But walking back in behind closed doors, there was a lot of hunkering down going on, just trying to survive and get through it.'"