At Heathrow Airport, Prince William and Kate Middleton were spotted. Queen Elizabeth was released from the hospital a few hours later.

According to the Daily Express in the United Kingdom, the royal couple may be departing for Greece to attend the wedding of Princess Diana’s godson, Prince Philippos, and Nina Flohr.

According to the article, the Duke and Duchess of Cambridge’s attendance assuaged concerns about the Queen’s health. The couple was accompanied by their children to the airport, according to the report.

Despite royal authorities indicating she was resting at home, questions over the health of 95-year-old Queen Elizabeth II arose on Friday after she underwent tests and spent the night in hospital.

On Wednesday morning, Buckingham Palace announced that she had canceled a planned engagement in Northern Ireland after receiving medical advice to rest.

But royal officials conceded late on Thursday that she had in fact had “some preliminary investigations” in hospital on Wednesday, and stayed overnight after The Sun newspaper broke the news.