The now mum-of-two said in an Instagram post she was "thankful for my baby girl", along with a photograph of a pink outfit with the name London written on it, with a teddy bear and love heart sunglasses.

Hilton also used her Instagram stories to tell her family she now had "two babies", and described her first child, Phoenix, as a "big brother".

Thursday marked the Thanksgiving holiday in the US, where millions of families gather for festive celebrations.

The businesswoman has not revealed when her daughter was born, but her son was born via surrogate in January.

In an earlier post, Hilton wrote: "I am so grateful for this beautiful life.

"This year has brought so many amazing blessings, the most incredible being becoming a mom.

"I am truly so thankful to be surrounded by such an incredible family, supportive friends and a loving husband. To many more years of love and thanks!"

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Hilton had long said she wanted a daughter, telling her podcast last year: "One day I want to have a little girl, and I want to name her London.

"That's always been my dream ever since I was a little girl, because I just love London and Paris together."