The Duchess of Cambridge, Camilla, and Queen Elizabeth are reportedly spending the day "bonding" over some shopping and lunch today.

According to a source, the royal ladies will spend the day together as a part of the tradition for the Royal Jubilee celebrations. The three generations of royalties will dine and enjoy some "retail therapy" at Fortnum and Mason department store.

"The Queen and two duchesses are all very much looking forward to it. The invitation would have come from the Queen to the other two and I'm sure we will see lots more joint engagements like this in future." claims a source to the tabloid, The Daily Mirror.

"Kate has a lot to learn from the more experienced royals and what better way to see how it's done than to watch the expert, the Queen, at work up close?" says the source.

This will be the first official public appearance of the three generations of royal ladies since Catherine became Duchess. Since Prince William is not on her side on Valentine's day due to his training in Falklands, Kate will still enjoy the occasion with her equally-sophisticated in-laws.

View the slideshow to view photos of Catherine, Camilla, and the Queen.

Retail Kate Middleton