Rob Kardashian shared a sweet post in honor of his daughter on Wednesday, which marked Dream's 5th birthday ... that she's now 5 years old. "HAPPY BIRTHDAY to my Best Friend!!

Khloé Kardashian Throws Daughter True a Lavish 'Octonauts'-Themed 5th Birthday Party: Photos "My sweet innocent happy girl, you are my everything. As sad as I am that you're getting older ...