Credit: Chris Jackson/Getty Images

Stepping out publicly for the first time since announcing their engagement November 16, Prince William and Kate Middleton were all smiles as they attended a holiday fundraiser in Fakenham, England Saturday.

Wearing a geometric black and white dress and a demure blazer, Middleton, 28, looked confident as she walked alongside the future King of England -- and with good reason.

"Kate was given royal assistance like no other girl has ever been given before entering the family," a palace insider recently told Us Weekly.

According to Katie Nicholl, author of William and Harry: Behind the Palace Walls, palace staff began showing Middleton footage of the late Princess Diana "getting out of a car and paparazzi going berserk, so that Kate would know how to deal with it. Now she already knows how this works."

The future Princess will also receive tutorials on royal correspondence, public speaking, and "how to behave at banquets," Nicholl added.