The Duke of Cambridge reportedly had difficulties adapting to parenthood.

Duke and Duchess of Cambridge

Duke and Duchess of Cambridge

Prince William's wife Duchess Catherine opened up to a single father, named Billy, about how her husband was "similar" to the single parent as he too found it hard being a dad during her visit to the Hornsey Road Children's Centre earlier this week.

Speaking to Hello! Online about his encounter with Catherine, billy - who is bringing up his seven-month-old daughter Violet single-handedly - said: "She was saying William was sort of similar and I just wanted to let her know how Family Action have been there for me and I think they need more support."

Catherine - who was formerly known as Kate Middleton before she married the 35-year-old royal - have four-year-old son Prince George and two-year-old daughter Princess Charlotte together, but they are also expecting their third child, who is due to be born in April next year.

During the trip Catherine also spoke to guests about her children's hobbies, and revealed her oldest child is obsessed with helicopters.

A mother named Michelle recalled her conversation with the 35-year-old beauty. She said: "She was asking about what Jacob liked and he said he liked aeroplanes and she was asking if he'd seen a Spitfire and we said we liked going to the Science Museum and RAF museum.

"She was saying how George likes helicopters--she was saying about the top floor of the Science Museum where the helicopters are."

Catherine was due to visit the children's centre - which offers support to those expecting children, new mothers, as well as antenatal, prenatal, family support services and child support - in September this year, but was forced to postpone the royal engagement because she was suffering from terrible morning sickness.