For the first time in 44 years Queen Elizabeth II will not attend the opening of the Commonwealth Games this year.
The games are to be held in October in the Indian capital of New Delhi.
There have been growing concerns around whether the games venues will be ready in time, along with fears around security.
Buckingham Palace said Prince Charles will attend the games instead of his mother.
"The volume of Her Majesty's engagements, coupled with other overseas commitments, means she will not be able to attend."
A palace spokesman gave no other reason but said the health of the 88-year-old monarch was not an issue.
Forty four years is a very long time for the Queen to have attended the Commonwealth Games: that would make 12 games she has attended.
All things come to an end: Mt Everest will eventually crumble under the forces of nature, our sun will expand and die in the process consuming the earth. All living things must eventually die.
That is why living in the moment is vital, we never know when our time to die will come. One technique we can use to achieve this is mindfulness. Being simply aware of what is happening hear and now.