ChicMe WW

Paris Hilton throws lavish first birthday party for son Phoenix

By Suki Reid|

Paris Hilton has celebrated the first birthday of her son Phoenix by throwing a lavish party at her Los Angeles home.

The theme was 'Sliving Under the Sea' and attracted A-list guests including Kelly Osbourne, N'Sync singer Lance Bass and Rumer Willis.

Sharing a look inside the star-studded event on Instagram, Hilton, 42, showed followers her transformed backyard, decked out with decorations.?

Watch the video above. ?

READ MORE: Viewers stunned to spot Oscar nominee quietly sitting in Australian Open crowd?

Inside Paris Hilton's 1st birthday party for son Phoenix
Hilton and Phoenix all ready for the celebrations. (Instagram)

The event was covered in fish-shaped balloons, sand-coloured flooring and a photo wall that brought the under-the-sea vision to life.?

With Disney's?The Little Mermaid?playing, Hilton held Phoenix as she explained the theme and day in a video to fans.

"It's Phoenix's first birthday and we have a 'Sliving Under the Sea' theme. I'm so excited," the mum of two said.

READ MORE: Only cocktail you'll want to drink in a heatwave?

"I've thrown amazing birthday parties my whole life, so to now be able to do this for my little boy is such a special memory."?

Inside Paris Hilton's 1st birthday party for son Phoenix with Kelly Osbourne
Hilton and son Phoenix with Kelly Osbourne. (Instagram)

Talking to her firstborn, who celebrated his birthday on January 16, she asked, "Are you ready for your birthday?" as she showed him the decorations.?

"Look, this is all for you! Look at this! Yay!" she told Phoenix, who was dressed in a white Fendi polo, sunnies and a flat cap.?

For a daily dose of 9Honey, subscribe to our newsletter here.

Khloe Kardashian throws extreme Octonauts party for True

They were joined by Bass and his two-year-old twins Alexander and Violet, Willis and her nine-month-old daughter Louetta, Osbourne and her son Sidney, and celebrity makeup artist Kat Von D and son Leafa, five.

Aside from her Hollywood pals, Hilton invited some sheep, chickens, bunnies, a unicorn and baby goats to join the petting zoo.

?READ MORE: Game of Thrones star's head-turning runway transformation?

On Instagram, Hilton shared some pictures and videos of the guests and Phoenix playing with the animals.?

The Hilton hotel heiress shares two children with her husband Carter Reum C Phoenix and his two-month-old sister London Marilyn, both of whom she welcomed via surrogate.?

Keeping both of her baby's arrivals a secret, even from her family, Hilton announced the news of her son's birth on Instagram, later explaining on her podcast?I am Paris.

Inside Paris Hilton's 1st birthday party for son Phoenix
The decorations for his birthday. (Instagram)

"As you all know, Carter and I have been blessed with the arrival of our baby boy. He is such a precious angel, and we're over the moon, so in love with him. We're just so excited to start our family, and we can't wait for you to see him," she said.?

"But for now, we've just been keeping everything really private. Not even my mom, my sisters, my best friend knew until he was over a week old.

READ MORE: Prince William breaks tradition with simple solo parenting act?

"It was really nice to have that with Carter, be our own journey together. I just feel like my life has been so public, and I've never really had anything be just mine."

Hilton also announced the birth of London via Instagram, sharing a snap of a pink onesie and sunglasses, captioned: "Thankful for my baby girl."

Property News: This five-bedroom, six-bathroom home at 671 Lincoln Avenue in Winnetka, Illinois is very familiar. Take a look at the house from Home Alone that is for sale.