Hilton on Friday shared an Instagram photo of a pink baby outfit with "London" printed on the top.
Hilton has been open about her journey to motherhood, freezing eggs and surrogacy.
Hilton had said that she was excited for Phoenix to have a baby sister named London.
Hilton and Reum announced the arrival of Phoenix
Celebrating Phoenix the ‘Big Brother’ on #Thanksgiving,” the caption reads on the video.
"It's my favorite city and I've always wanted to name my daughter London
she and Reum opted to use a surrogate to have their son.
“Thankful for my baby girl,” the caption reads on her Instagram photo
She has been engaged several times but is not currently married. She was famously engaged to Greek shipping heir Paris Latsis in the 2000s.
She is estimated to have a net worth somewhere between $300-$500 million. She owns multiple residences in desirable locations around the world.
She has released two studio albums, starred in multiple television shows and films, written an autobiography and published books, and worked as a DJ.