Kate is the picture of elegance in a Catherine Walker design for the Queen's 90th birthday

The Duchess of Cambridge had all eyes on her elegant ensemble as she stepped into St Paul's cathedral on Friday morning (June 10). Kate was the epitome of chic wearing a pale-blue creation by one of her favourite designers, Catherine Walker.

The dress featured white appliquéd lace detailing running the length of the dress, while a V neck added a modern touch to the formal number.

Kate topped off the look with a white pillbox hat by her favourite milliner Jane Taylor. Her famous locks were tied up into a chic chignon that ensured the stunning headgear took centre stage.

TAP TO VIEW FULL GALLERYDuchess Kate in Catherine Walker outfit Kate looked chic in the Catherine Walker creation

The royal has long been a fan of Catherine Walker, often sporting her designs for formal events.

Kate was accompanied by her husband Prince William as she arrived at the cathedral, and they joined a host of other royal family members to celebrate the Queen's 90th birthday.

Duchess Kate in Jane Taylor pillbox hat Kate topped the look off with a white Jane Taylor pillbox hat

Prince Charles, the Duchess of Cornwall and Prince Harry were all in attendance, while Prince Andrew and his daughters Princess Eugenie and Princess Beatrice also made up the royal party.

The service is held each year to mark the Queen's birthday and falls on the day before the traditional Trooping the Colour ceremony.

kate-middleton4 The royal tied her hair back in a chic chignon

The service was held to celebrate the Queen's life with a series of prayers, hymns, readings and musical performances. It marks the beginning of a weekend of national and Commonwealth celebrations.

Prominent guests at the ceremony included Prime Minister David Cameron, who gave a reading from the New Testament, and the Archbishop of Canterbury, who preached the sermon.

Duchess Kate with her entourage Prince William and Harry

HELLO! Canada magazine is available for your tablet and smartphone. Get HELLO! Canada, PEOPLE, Vanity Fair and over 100 more of the world’s best magazines for one low monthly price at Texture by Next Issue. CLICK HERE to sign up for a free trial.