Kate Middleton is known worldwide and the 33-year-old duchess has met thousands of people as part of her royal duties, but who could Middleton trust with a secret? A secret, like, perhaps, the gender of the next royal?

Pippa Middleton

Pippa Middleton is Kate's younger sister and reportedly Kate's closest friend. The 31-year-old Middleton has been helping her royal sister and as HNGN reported, Pippa reportedly hopes to move in to Amner Hall after royal baby number two is born.

James Middleton

Kate's dashing 28-year-old brother is the founder of the luxury marshmallow company Boomf. As a wedding gift, James gave Kate and Prince William their puppy, Lupo, who has been boy's best friend since Prince George was born. Kate and James often play tennis together.

Emilia d'Erlanger

D'Erlanger is Prince George's godmother and has been friends with Kate since the girls were just 13-years-old. Perhaps d'Erlanger had a hand in choosing the three pink paint samples sent to Amner Hall HNGN reported on earlier in April? There is some talk that the new baby's godfather could be d'Erlanger's banking heir husband, David Jardine-Paterson.

Rebecca Deacon

Deacon is the duchess' chief of staff and private secretary. According to Good Morning America, Deacon is the daughter of a vicar and is discreet - an important quality to the private couple - with "a great sense of humor."

Olivia Bleasdale

Bleasdale was one the duke and duchess' roommates at St. Andrews University where Bleasdale shared an off-campus farmhouse with the couple.

Hugh and Lady Rose van Cutsem

Hugh is one of William and Harry's oldest friends and Hugh's family even lived in Amner Hall when the princes were little. The two couples are still geographically close as the van Cutsems have a home near Amner Hall. According to the Daily Mail, Hugh is another contender for godfather.

Trini Foyle

Foyle has been Kate's friend since they were schoolgirls and was by the duchess' side when she and Prince William broke up in 2007. She must know some secrets!

Amanda Cook Tucker

Who doesn't tell their hairdresser everything? Tucker has been with the royal family so long, she reportedly cut William and Harry's baby locks.