The Queen is expected to attend a joint-christening ceremony on Saturday and Princess Eugenie and Zara Tindall christen their babies.
The monarch has had to pull out of a string of public events in recent weeks, including a scheduled appearance at the Cop26 climate summit in Glasgow and the Remembrance Sunday ceremony, due to a back sprain.
But The Sun newspaper has reported that she is planning to attend as the second cousins are baptised on Saturday at All Saints Chapel in Great Windsor Park, Berkshire.
It is understood she will take a decision on the day and consult with her personal doctor in advance.
Others in attendance will likely include Prince William and Kate Middleton.
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A royal source said: “Her Majesty is very keen to be there as she knows how important this is for her grandchildren and great-grandchildren.
"It’s set to be a heartwarming family occasion and a time of real celebration after what has been some challenging times for certain royals of late, including the Queen herself.
“She is keen to attend such a wonderful event after the great personal disappointment of missing last Sunday’s Remembrance events.”
It is thought tomorrow is the first time members of the Royal Family will have been baptised together.
Princess Eugenie and husband Jack Brooksbank’s son August was meant to be christened in July before the event was cancelled due to Covid.
He will be baptised alongside Lucas Philip, the son of Mike and Zara Tindall, born in March.
The ceremony will be led by Canon Martin Poll, who is chaplain to Great Windsor Park and will take place at the private Grade-II listed church which forms part of the Royal Lodge house.
