Kate Middleton's emotional confession about the loneliness of motherhood.

Just days after Prince Harry revealed he sought counselling to deal with the death of his mother, Kate Middleton has shared her own emotional confession.

During an event at the Global Academy in London, The Duchess of Cambridge and mum to Prince George, 3, and 23-month-old Princess Charlotte said she found motherhood “lonely”.

Kate with her two young children last year. Image via Getty.

"It is lonely at times," she told the room.

"You do feel quite isolated."

Speaking to two young mothers who had told Kate they felt "in need of a friend" after having children, Kate told them, "so many other mothers are going through exactly what you're going through."

"It's being brave enough, like you obviously were, to reach out," she said.

Kate's candid confession comes a week after a magazine claimed she had been turning to "online mums' groups" for guidance.

Kate has been opening up about her experience as a mother: just last month she said she felt "unprepared" for the overwhelming experience of motherhood.

Kate's second child Charlotte is nearly two-years-old. Getty Images.

"It is full of complex emotions of joy, exhaustion, love, and worry, all mixed together. Your fundamental identity changes overnight," she said at the launch of a series of education films.

"You go from thinking of yourself as primarily an individual, to suddenly being a mother, first and foremost."

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