As the only royal godparent the pressure was on Zara Tindall today.

And the 32-year-old seemed to take inspiration from Victoria Beckham's maternity wardrobe as she arrived at St James's Palace wearing a simple navy coat and matching headpiece.

Whilst most of the group, including Camilla, Duchess of Cornwall, Pippa Middleton and Kate herself chose pale colours for the christening, pregnant Zara draped her growing bump in chic navy.

Victoria Beckham wore a similar outfit for the Royal Wedding in April 2011 when she was pregnant with daughter Harper.

Zara was one of the first to arrive at the chapel, holding hands with her rugby player husband Mike Tindall.

The horsewoman looked chic in a knee-length navy coat and dress by one of the Queen's favourite designers Stewart Parvin,

She finished the look with a boxy turquoise clutch bag, a pair of simple court shoes and a £518 hat by Rachel Trevor-Morgan.

The Middleton sisters both chose to wear cream for the historic occasion, with Pippa opting for a 'trapeze' coat and 'Paris' dress by British designer, Suzannah.

The cream wool coat costs £750. She teamed her outfit with a jaunty hat and carried a peach clutch bag.

Proud mother Kate chose a ruffled cream design by Alexander McQueen, the label behind her 2011 wedding dress. 

Zara is the only member of the royal family to be godparent, while Kate's old schoolfriend Emilia Jardine-Paterson and family friend William van Cutsem have both been asked to take on the role.

The other godparents are the couple's university friend Oliver Baker, William and Harry's Private Secretary Jamie Lowther-Pinkerton, the Duke of Westminster's son Hugh Grosvenor, and Julia Samuel, an old friend of Princess Diana's.

The seven godparents, announced this morning, show how the Cambridges have dispensed with the tradition of picking other royals and foreign dignitaries, choosing instead close friends to guide their first-born son.

The christening itself is set to be a intimate affair and the godparents and their spouses will make up a crowd of only 24 people attending the 3pm service.

As well as ignoring protocol by only inviting five senior royals, the Cambridge's have also broken from tradition by not having their son christened at Buckingham Palace.

Instead the future king will be carried and blessed by the Archbishop of Canterbury, the Most Rev Justin Welby, in the little known Chapel Royal at St James's Palace this afternoon.

Queen Victoria and Prince Albert were married there in 1840, and George will be christened in a replica of the intricate lace and satin christening gown made for Victoria's eldest daughter, Victoria, the Princess Royal, in 1841.