Prince Charles is set to step into his dad Prince Philip's shoes by accompanying the Queen to the State Opening of Parliament.
Whitehall officials have been asked to designate him a role as his mum's official "consort" following Philip's death.
This would normally have been the role occupied by the Duke of Edinburgh, who died this month aged 99.
The aim is to reduce the workload of the Queen, who turned 95 earlier in April, the Sun reports.
Charles, the heir to the throne, will shoulder a greater burden of royal duties before eventually becoming King.
He discussed the future with his father before the latter's death in a heart to heart by Philip's bed.
The Duke of Edinburgh retired from public duties in 2016 and Charles has accompanied the Queen to the state opening before.
This time he is likely to play "a more significant and active role" in the ceremony on May 11.
A Lords source said: "It is a clear signal that the Queen does not want the crown to skip a generation and that Prince Charles will start taking on an even bigger role in royal life.
"There will be a visible show of support for the Queen from senior members of the family at future events, and the opening of Parliament is no exception.
"The Queen has been incredibly stoic throughout the last few weeks, but the family are determined to rally round and support her.
"Charles will be at the forefront of those efforts as heir."
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Charles's son Prince William, the second in line to the throne, is also expected to step up and take on more duties.
Palace sources claim the bold statement he made in opposition to football's European Super League as president of the Football Association showed he was growing into is role.
William's wife Kate Middleton has also impressed, acting as peacemaker between William and his brother Prince Harry at Philip's funeral in their first meeting in more than a year.
The source continued: "William and Kate are determined to lead from the front.
"William's tribute to his grandfather about 'getting on with the job' was very apt."
Prince Edward's wife Sophie, Countess of Wessex, is also set to shoulder more responsibility but it is said to be unlikely that Prince Andrew will be called back into the fold while there are still questions about his relationship with shamed billionaire Jeffrey Epstein.
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