"Little rascal" Prince George was left at home today as his parents the Duke and Duchess of Cambridge paid a visit to a marathon event in Anglesey.

The new parents took time out from changing nappies to meet the runners and organisers of the Ring O' Fire race, which takes place annually on the island.

It's the first public appearance for the Duchess since the birth of her son six weeks ago.

prince william and kate middleton

The Duke and Duchess of Cambridge in Anglesey on Friday

kate duchess of cambridge
The Duchess was described as looking 'absolutely gorgeous' by onlookers

She wore black skinny jeans, a sage jacket and platform heels and was described as looking "absolutely gorgeous" by locals attending the event.

It is expected to be one of William and Kate's final public engagements on Anglesey as the new father's time on the island comes to an end and the young family move to London.

William was acting as starter for the race, which has been described as an "ultra" marathon - a three-day, 135-mile foot race around the rugged coast of Anglesey.

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  • The Duke And Duchess Of Cambridge Start The Ring O'Fire Anglesey Coastal Ultra Marathon

    HOLYHEAD, WALES - AUGUST 30: Catherine, Duchess of Cambridge and Prince William, Duke of Cambridge start The Ring O'Fire Anglesey Coastal Ultra Marathon on August 30, 2013 in Holyhead, Wales. (Photo by Mark Cuthbert/UK Press via Getty Images)

  • The Duke And Duchess Of Cambridge Start The Ring O'Fire Anglesey Coastal Ultra Marathon

    HOLYHEAD, WALES - AUGUST 30: Catherine, Duchess of Cambridge and Prince William, Duke of Cambridge start The Ring O'Fire Anglesey Coastal Ultra Marathon on August 30, 2013 in Holyhead, Wales. (Photo by Mark Cuthbert/UK Press via Getty Images)

  • The Duke And Duchess Of Cambridge Start The Ring O'Fire Anglesey Coastal Ultra Marathon

    HOLYHEAD, WALES - AUGUST 30: Catherine, Duchess of Cambridge and Prince William, Duke of Cambridge start The Ring O'Fire Anglesey Coastal Ultra Marathon on August 30, 2013 in Holyhead, Wales. (Photo by Mark Cuthbert/UK Press via Getty Images)

  • The Duke And Duchess Of Cambridge Start The Ring O'Fire Anglesey Coastal Ultra Marathon

    HOLYHEAD, WALES - AUGUST 30: Catherine, Duchess of Cambridge and Prince William, Duke of Cambridge start The Ring O'Fire Anglesey Coastal Ultra Marathon on August 30, 2013 in Holyhead, Wales. (Photo by Mark Cuthbert/UK Press via Getty Images)

  • The Duke And Duchess Of Cambridge Start The Ring O'Fire Anglesey Coastal Ultra Marathon

    HOLYHEAD, WALES - AUGUST 30: Catherine, Duchess of Cambridge starts The Ring O'Fire Anglesey Coastal Ultra Marathon on August 30, 2013 in Holyhead, Wales. (Photo by Mark Cuthbert/UK Press via Getty Images)

  • The Duke And Duchess Of Cambridge Start The Ring O'Fire Anglesey Coastal Ultra Marathon

    HOLYHEAD, WALES - AUGUST 30: Catherine, Duchess of Cambridge starts The Ring O'Fire Anglesey Coastal Ultra Marathon on August 30, 2013 in Holyhead, Wales. (Photo by Mark Cuthbert/UK Press via Getty Images)

  • The Duke And Duchess Of Cambridge Start The Ring O'Fire Anglesey Coastal Ultra Marathon

    HOLYHEAD, WALES - AUGUST 30: Catherine, Duchess of Cambridge and Prince William, Duke of Cambridge start The Ring O'Fire Anglesey Coastal Ultra Marathon on August 30, 2013 in Holyhead, Wales. (Photo by Mark Cuthbert/UK Press via Getty Images)

  • The Duke And Duchess Of Cambridge Start The Ring O'Fire Anglesey Coastal Ultra Marathon

    HOLYHEAD, WALES - AUGUST 30: Catherine, Duchess of Cambridge and Prince William, Duke of Cambridge start The Ring O'Fire Anglesey Coastal Ultra Marathon on August 30, 2013 in Holyhead, Wales. (Photo by Mark Cuthbert/UK Press via Getty Images)

  • Ring O' Fire Anglesey Coastal Ultra Marathon

    The Duchess of Cambridge arrives at Breakwater Country Park for the start of the Ring O' Fire Anglesey Coastal Ultra Marathon, a three-day, 135-mile foot race around the rugged coast of Anglesey.

  • Ring O' Fire Anglesey Coastal Ultra Marathon

    The Duchess of Cambridge at Breakwater Country Park for the start of the Ring O' Fire Anglesey Coastal Ultra Marathon, a three-day, 135-mile foot race around the rugged coast of Anglesey.

  • Ring O' Fire Anglesey Coastal Ultra Marathon

    The Duke and Duchess of Cambridge arrive at Breakwater Country Park for the start of the Ring O' Fire Anglesey Coastal Ultra Marathon, a three-day, 135-mile foot race around the rugged coast of Anglesey.

  • Ring O' Fire Anglesey Coastal Ultra Marathon

    The Duchess of Cambridge arrives at Breakwater Country Park for the start of the Ring O' Fire Anglesey Coastal Ultra Marathon, a three-day, 135-mile foot race around the rugged coast of Anglesey.

  • Ring O' Fire Anglesey Coastal Ultra Marathon

    The Duke and Duchess of Cambridge at Breakwater Country Park for the start of the Ring O' Fire Anglesey Coastal Ultra Marathon, a three-day, 135-mile foot race around the rugged coast of Anglesey.

  • Ring O' Fire Anglesey Coastal Ultra Marathon

    The Duchess of Cambridge at Breakwater Country Park for the start of the Ring O' Fire Anglesey Coastal Ultra Marathon, a three-day, 135-mile foot race around the rugged coast of Anglesey.

  • Ring O' Fire Anglesey Coastal Ultra Marathon

    The Duke and Duchess of Cambridge speak to well wishers at Breakwater Country Park at the start of the Ring O' Fire Anglesey Coastal Ultra Marathon, a three-day, 135-mile foot race around the rugged coast of Anglesey.

  • Ring O' Fire Anglesey Coastal Ultra Marathon

    The Duke and Duchess of Cambridge start the Ring O' Fire Anglesey Coastal Ultra Marathon at Breakwater Country Park, a three-day, 135-mile foot race around the rugged coast of Anglesey.

  • Ring O' Fire Anglesey Coastal Ultra Marathon

    The Duchess of Cambridge speaks to well wishers at Breakwater Country Park for the start of the Ring O' Fire Anglesey Coastal Ultra Marathon, a three-day, 135-mile foot race around the rugged coast of Anglesey.

  • Ring O' Fire Anglesey Coastal Ultra Marathon

    The Duchess of Cambridge speaks to well wishers at Breakwater Country Park at the start of the Ring O' Fire Anglesey Coastal Ultra Marathon, a three-day, 135-mile foot race around the rugged coast of Anglesey.

  • Ring O' Fire Anglesey Coastal Ultra Marathon

    The Duchess of Cambridge arrives at Breakwater Country Park for the start of the Ring O' Fire Anglesey Coastal Ultra Marathon, a three-day, 135-mile foot race around the rugged coast of Anglesey.

  • Ring O' Fire Anglesey Coastal Ultra Marathon

    The Duchess of Cambridge speaks to well wishers at Breakwater Country Park at the start of the Ring O' Fire Anglesey Coastal Ultra Marathon, a three-day, 135-mile foot race around the rugged coast of Anglesey.