You’re only as old as you feel — just ask Paris Hilton!

Getting in touch with her inner child, the bleach blonde starlet attended the Hello Kitty 35th anniversary celebration in Culver City, CA last night (October 22).

Held at Royal/T, Miss Hilton was joined by diva designer Kimora Lee Simmons and her adorable daughters Ming Lee and Aoki Lee Simmons.

At the event, Paris tweeted: “Just ran into Kimora Lee Simmons at The Hello Kitty Party. I love her, she’s so sweet and her daughters are beautiful Love her Jewelry Line!”

She later showed off her swag — a beautiful diamond Hello Kitty necklace designed by Kimora. CLICK HERE to check it out. Says Paris, “Loves it!”