Some of the people honoured as Orders of British Empire, including gymnast Louis Smith and choreographer Arlene Phillips, have updated their Twitter profiles with their new titles.
Louis Smith has tweeted this photo of himself "chilling" with his MBE:
Olympic gymnast Louis Smith has tweeted about being awarded with an MBE this afternoon.
Chilling with my MBE on the palace steps think its frozen to my hand lol. Thanks for all your messages xx http://t.co/twyQhe6h
Sophie Hosking, from Wimbledon, was also awarded an MBE for services to rowing.
The athlete, who won gold in the Lightweight Women's Double Scull at London 2012, learned to row at school in Kingston and now trains at the London Rowing Club in Putney.
The Olympic gymnast Louis Smith has received his Member of the British Empire (MBE) medal in an investiture ceremony at Buckingham Palace.
Olympic silver-medallist Louis Smith has revealed on Twitter that he turned up at Buckingham Palace without his invitation.
The gymnast, who trains in Basildon in Essex, blamed his manager for forgetting it.
Smith will be presented with an MBE today.
Today is the day I become Louis Smith M.B.E ooooooo exciting times
After winning a silver and bronze medal in the London 2012 Olympics, he said being chosen for the honour was the proudest moment of his life.
Following the Olympics, Smith won BBC dance series Strictly Come Dancing.
Paralympic dressage rider Natasha Baker is to receive an MBE today, after winning two gold medals at last summer's Olympics.
She said being chosen for the honour was "absolutely incredible".
Sophie Hosking, who won a gold medal in lightweight women's double sculls, will be presented with an MBE at the investiture ceremony at Buckingham Palace today.
Natasha Baker has won a second gold medal at her first Paralympic Games in the individual freestyle grade II.