Kim Kardashian has babies on the brain -- and she even has a father all picked out.

On Sunday morning, the Kourtney and Kim Take New York star, 30, Tweeted a cute childhood pic of beau Kris Humphries.

"I want my son to look like this!" Kardashian wrote.

About a month ago, Kardashian first stepped out with the New Jersey Nets basketball player, 25 -- just days after splitting from model Gabriel Aubry.

In the past, the star has been ambivalent about becoming a mom like her sister Kourtney, 31. "Let's just say Mason is the best birth control ever!" she said during a July radio interview. "I'm definitely happy to wait awhile."

Yet on an episode of Kourtney and Khloe Take Miami taped earlier that year, she admitted, "I seriously thought by the time I was 30, I would have one [baby] and a bun in the oven...I cannot wait to have a baby just like [Mason]."