The Team GB favourite, who won gold in the Women's Heptathlon at the Olympics, said she is stunned that the likes of Prince Harry, Prince William and Kate Middleton want to mingle with her.
"I literally couldn't believe Prince William knew my name," she told the Daily Mail. "He came up to me and said, 'Hello Jess', and I was just like, 'Wow'. I couldn't believe it.
"He was so lovely, as were Harry and Kate. They were all really down to earth and wandered through the Olympic Village chatting to everyone. Both William and Harry are both really good looking.
"I have also met Jamie Oliver and David Beckham, who were both just so lovely too."
However, Ennis noted that she has not been too tempted by the celebrity lifestyle since her triumph at the Games.
"I have just been chilling out," she revealed. "I love going home to Sheffield where the support has been incredible.
"I am spending lots of time with my fiancé, pigging out on takeaways and watching DVDs."
Ennis has said that she would be up for joining The X Factor as a guest mentor along with a number of other London 2012 stars.