The Queen's granddaughters Princess Eugenie and Zara Tindall had a joint christening for their babies

• Princess Eugenie and Zara Tindall had a joint christening ceremony for their sons on Sunday.

• The Queen attended the ceremony after canceling previous engagements due to health issues.

• It marked the first joint royal christening ceremony in the UK, the Evening Standard reports.

Queen Elizabeth II attended a christening ceremony for her great-grandsons over the weekend.

Her Majesty's granddaughters Princess Eugenie and Zara Tindall hosted a joint christening for their babies at the Royal Lodge in Windsor on Sunday evening, the Evening Standard reports.

The royal cousins gave birth within weeks of one another earlier this year, as Eugenie welcomed her first child, August Philip Hawke Brooksbank, on February 9 and Tindall gave birth to her third child, Lucas Philip Tindall, on March 21.

Both babies were given the middle name Philip as a tribute to the late Duke of Edinburgh.

The ceremony on Sunday marks the first joint royal christening to take place in the UK, according to the Evening Standard.

"Masters August Brooksbank and Lucas Tindall were christened in a private family service at All Saints Chapel, Royal Lodge, Windsor, today. The service was attended by The Queen, immediate family and close friends," Rebecca English, royal editor at the Daily Mail, wrote on Twitter.

Other royals reportedly in attendance included Prince Andrew and the Duke and Duchess of Cambridge, the Evening Standard reports.

The Queen was shown wearing a green jacket and matching hat as she departed the service in photos published by The Telegraph. The monarch was said to have been determined to attend the ceremony despite recent health issues, the publication added.

The Queen was forced to pull out of a Remembrance Sunday service on November 14 due to a sprained back.

In October, the Queen canceled a trip to Northern Ireland based on medical advice from her doctor and later spent the night in the hospital for "preliminary investigations."

Buckingham Palace did not immediately respond to Insider's request for comment.

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