The Duchess of Cambridge spoke to a single dad during a visit to Family Action, a care centre for expecting and new parents.
The duchess, who is pregnant with her third child, reportedly told the new father, Billy, that the prince 'did not know what exactly to do when he first became a father.'
Talking to the Telegraph, Billy 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.'
Billy, who also told the publication he suffers from depression, is raising a 7-month-old daughter.
'I was suffering from severe depression and I thought, 'I'm not going to let my daughter go into care, I'm going to step up and do this.' I managed to turn myself around.' Billy told.
The royal couple is expected to welcome the third child in April 2018.