Kate Middleton made her first public appearance since giving birth to baby George at the Ring o'Fire Ultra Marathon in Anglesey, Wales, on Friday.

The Duchess of Cambridge opted for a casual look - tight black jeans, a white blouse and green jacket. She looked pretty fabulous considering she welcomed her son just five weeks ago.

Middleton was accompanied by her husband Prince William, but baby George didn't make an appearance at the event.

Last week the couple released two photos of themselves with...drum roll, please...His Royal Highness Prince George Alexander Louis of Cambridge. In a break from tradition, the images were taken by Middleton's father instead of an official photographer.

William recently told CNN that the infant is a "little bit of a rascal…he either reminds me of my brother or me."

The family intends on moving to Kensington Palace once renovations are complete on their apartment. They are currently living at the Middleton's estate in Bucklebury.

Check out more photos of Kate...