Paris Hilton shares adorable new photos of newborn son Phoenix

So precious.

Paris Hilton has shared some adorable new pictures of her newborn son Phoenix. The American socialite posed for some black and white shots of herself cuddling her son, posting them to her Instagram on Monday. “My whole heart. #MommyMonday,” she captioned the pictures. In February, Paris revealed that she had named her son Phoenix Barron Hilton Reum, wanting to stick with the theme of being named after a city – like herself. In a promotional video for her new memoir, the mum said: "My beautiful baby boy’s name is Phoenix Barron Hilton Reum. We plan to name him Phoenix, a name that I decided years ago. "When I was searching cities, countries, and states on a map, looking for something to go with Paris and London." "Phoenix has a few good pop culture reference points, but more importantly it’s a bird that flames out and then rises from the ashes to fly again." Paris continued: "I want my son to grow up knowing that triumph and disaster go around and come around throughout our lives, and that this should give us great hope for the future. "Carter and I are so proud to welcome him into the world," the new mum added. The 42-year-old became a mum for the first time in January when her son was born via surrogate.