Britain's Duchess Catherine attended the wedding of a family friend yesterday (29.09.12).

The 30-year-old royal watched as her father Michael Middleton played father-of-the-bride to Thierry Kelaart - whose father died 20 years ago - at her marriage to environmental consultant Patrick Heathcoat-Amory.

Her mother Carole Middleton and sister Pippa Middleton were also in attendance at the wedding at St Bartholomew's Church in rural Oxfordshire.

A source told The Mail on Sunday: "It has all been very laid back. Thierry's mother Bessie has invited Michael and Carole as well as a few other local families round for shepherd's pie tomorrow."

Fashionable Catherine - also known as Kate Middleton - wore a pale blue Erdem Moralioglu dress with flower embroidery, the same creation she wore at Trooping of the Colour earlier this year.

She teamed it with a white hat and a small grey handbag.

Pippa opted for a coffee-coloured outfit and matching nude heels.

Prince William - who wed Catherine in a lavish ceremony at London's Westminster Abbey in April 2011 - was not present at the wedding due to work commitments in north Wales.