Kate Middleton and stepmother-in-law Camilla Parker-Bowles spent the day together, cheering Zara Phillips on, along with other members of the royal family, as the Queen's granddaughter competed in the equestrian individual and team eventing at the London 2012 Olympic Games.

Kate and Camilla were clearly enjoying themselves throughout the event, sharing jokes and peals of laughter. They parted on excellent terms, kissing each other goodbye.

The event, held at Greenwich Park, saw the royal family turnout in force - Prince William, Prince Harry, Princess Anne, Princess Eugenie, Princess Beatrice and Prince Philip - to show their support for Phillips, who finished the day in joint tenth place, with a penalty score of 46.10.

Zara Phillips, the daughter of Princess Anne, is an accomplished equestrian and is making her Olympics debut this year; she missed the Beijing 2008 Games because her horse, Toytown, suffered an injury during training sessions. She is now competing with her new horse, High Kingdom. Phillips later described her Olympic debut in glowing terms, calling it an "amazing feeling".

"It was incredible, an amazing feeling to be part of the Olympics and to ride for your country and to just be here. The crowd are amazing," she said, according to an official statement by London 2012.

This may be her first ever Olympics but Phillips gave her family and the nation something to cheer about, after Team GB took silver in the team eventing final early on the morning of 31 July, with Kate Middleton, Prince William and Prince Harry in attendance to cheer their cousin on.

"My horse is such a dude. He lost a front shoe, so he really stepped up today. The course was very suitable for him," an elated Phillips was quoted as saying by the BBC, after clearing the course in nine minutes and 56 seconds, the fifth fastest time of the day.

Veteran equestrian Mary King (on Imperial Cavalier), William Fox-Pitt (on Lionheart), Nicola Wilson (on Opposition Buzz) and Kristina Cook (on Miners Frolic) were the other members of the team that finished second, scoring a penalty of 138.20 to Germany's 133.70. The New Zealand team claimed bronze with a penalty of 144.40.

Check out photographs of the Kate Middleton, the Duchess of Cambridge; Camilla Parker-Bowles and the rest of the British royal family, as they cheered Phillips on in the cross-country and jumping events...

Camilla Parker Bowles and Catherine Middleton chat while they wait to watch Britain's hopeful Zara Phillips compete in the individual equestrian cross country event in the London 2012 Olympic Games.Reuters
Camilla Parker Bowles, Catherine Middleton, Prince William and Sebastian Coe wait for Britain's hopeful Zara Phillips to compete in the individual equestrian cross country event in the London 2012 Olympic Games.Reuters
Camilla Parker Bowles, Duchess of Cornwall, Kate Middleton, Duchess of Cambridge, and Prince William chat while they wait for Britain's hopeful Zara Phillips compete in the individual equestrian cross country event in the London 2012 Olympic Games.Reuters
Britain's Zara Phillips competes in the Eventing Cross Country equestrian event (Left) and performs during the equestrian Eventing Individual Dressage Day 2 (Right) at the London 2012 Olympic Games in Greenwich Park.Reuters
Britain's Zara Phillips competes in the Eventing Cross Country equestrian event at the London 2012 Olympic Games in Greenwich Park.Reuters
Britain's Princess Anne and Prince Philip watch Princess Anne's daughter Zara Phillips compete in the Eventing Individual Dressage equestrian event at the London 2012 Olympic Games.Reuters
Britain's Zara Phillips competes in the Eventing Cross Country equestrian event (Left and Centre) and performs during the equestrian Eventing Individual Dressage Day 2 (Right) at the London 2012 Olympic Games in Greenwich Park.Reuters
Duchess of Cambridge Catherine Middleton, Prince William, Seb Coe, Prince Harry, Princess Eugenie and Princess Beatrice watch Britain's hopeful Zara Phillips compete during the equestrian cross country event in the London 2012 Olympic Games.Reuters
Duchess of Cambridge Catherine Middleton, Prince William, Seb Coe, Prince Harry, Princess Eugenie and Princess Beatrice watch Britain's hopeful Zara Phillips compete during the equestrian cross country event in the London 2012 Olympic Games.Reuters
Camilla Parker Bowles, Duchess of Cornwall, Catherine Middleton, Duchess of Cambridge and Prince William wait for Britain's hopeful Zara Phillips to compete in the individual equestrian cross country event in the London 2012 Olympic Games.Reuters
Duchess of Cambridge Catherine Middleton, Prince William, Seb Coe, Prince Harry, Princess Eugenie and Princess Beatrice watch Britain's hopeful Zara Phillips compete during the equestrian cross country event in the London 2012 Olympic Games.Reuters
Prince William, Sebastian Coe and Prince Harry watch Britain's hopeful Zara Phillips compete in the individual equestrian cross country event in the London 2012 Olympic Games.Reuters
Britain's Prince William, his wife Catherine, Duchess of Cambridge and Prince Harry attend the Eventing Jumping equestrian event at the London 2012 Olympic Games in Greenwich Park, 31 July, 2012.Reuters
Britain's Prince William and his wife Catherine, Duchess of Cambridge, attend the Eventing Jumping equestrian event at the London 2012 Olympic Games in Greenwich Park, 31 July, 2012.Reuters
Britain's Prince William, his wife Catherine, Duchess of Cambridge and Prince Harry attend the Eventing Jumping equestrian event at the London 2012 Olympic Games in Greenwich Park, 31 July, 2012.Reuters