Kate Middleton stepped out for antique shopping in Hungerford, England, on Saturday. The Duchess of Cambridge's outing came as Prince William and Prince Harry attended a friend's wedding in Northumberland earlier that day. Pregnant Kate skipped out on the bash, but her sister, Pippa Middleton, Harry's current girlfriend, Cressida Bonas, and Harry's ex-girlfriend Chelsy Davy all attended the wedding. Kate stopped attending formal functions earlier this month after she made her final public appearance at the Trooping the Colour parade. She is currently on royal maternity leave as she prepares for the arrival of her baby in July. Kate Middleton has been shopping for the past few months as she prepares for her new arrival, including making a stop at the late Princess Diana's favorite children's furniture store, Dragons of Walton Street. The unborn baby, whose gender has not yet been revealed, will first be introduced to the world when an official announcement is placed at the gates of Buckingham Palace — be sure to find out more details about the royal baby's birth ahead of the little prince or princess's arrival!