Babies on the brain!

There are some celebrities out there who just couldn't wait to be parents — and others who were #blessed with "happy accidents."

MORE: Check Out Pregnant Chelsea Houska's Growing Baby Bump

From Kim Kardashian and Kanye West to her brother and sister-in-law to be, Rob Kardashian and Blac Chyna, some of Hollywood's biggest pregnancy bombshells had us thinking, "That was fast!"

See which stars wasted no time having kids in the gallery!