Kate Middleton reportedly offered to be a nanny on her sister Pippa Middleton's upcoming wedding. Sources say that the Duchess of Cambridge does not want to overshadow the bride on her nuptials so she will take a step back and just look after the children who will be at the big day.

As stated by a friend to The Sun, "Kate wants her sister to be in the spotlight so is taking a step back." It was added that Pippa invited everyone's children to her special day and Kate Middleton will be babysitting them so that the event will run smoothly.

It was further learned that no couple with children is bringing their nannies since Kate Middleton already volunteered to do their job of taking care of the kids. The Duchess of Cambridge thinks this is the best way she could help her sister Pippa as she has been quite stressed with all the wedding preparations.

So far, this is just the sweetest thing that Kate Middleton has done for her equally beautiful sibling. No wonder many people say that she is one of the best people around.

Still, some commented that Kate Middleton may have said that she will be looking after the guests' children on the wedding day, but she may have meant that she will take care of it by hiring some professional staff to do the job. In this way, she will not miss Pippa's nuptial ceremony and celebration.

As for the talks that Princess Charlotte and Prince George are going to be a flower girl and a page boy, the Duchess of Cambridge and Prince William feel that their children are too young to do it. Thus, it is likely that the royal kids are not going to be part of the wedding entourage.

Meanwhile, Pippa is set to wed billionaire hedge fund manager James Matthews on May 20. The couple chose to hold their wedding ceremony at St. Mark's Church locate in Englefield, Berkshire, Mirror UK reported.

Finally, the reception will follow at Pippa and Kate Middleton's parents' home in Bucklebury. The garden will serve as the venue and it will be arranged and turned into a luxurious marquee.