Khloe better watch out — her big sister Kim is determined to be the NEXT pregnant Kardashian sister!

The newly engaged reality star and her NBA star beau Kris Humphries plan to start trying for babies as soon as they are husband and wife — Kim wants a baby no later than 2012!

When asked about pregnancy plans, Kim, 30, told Us Weekly on June 7, “I hope so, I really hope so. Maybe by the end of the year. Well, I won’t have (a baby) by the end of the year, but maybe we’ll start trying by the end of the year. After the wedding.”

We’re still waiting for a wedding date from this secretive couple — but it’s expected to be soon!

Kim’s not the only Kardashian sister with babies on the brain — little sister Khloe‘s desperate to start a family with husband Lamar Odom, but they’re struggling to conceive. Khloe recently revealed the pair are even considering fertility treatments to help them.

Fingers crossed Kim doesn’t have the same trouble — and we’re all soon inundated with the pitter patter of tiny Kardashians!

Who do YOU think will get pregnant first?

– Ian Garland

More Kardashians on HollyBaby:

1. Kourtney Kardashian Wants To Beat Her Sisters To The Maternity Ward By Having ANOTHER BABY!
2. Khloe Kardashian & Lamar Odom Take A Baby-Making Vacation & Decide To Try IVF!
3. Is Kim Kardashian Already Pregnant? She Doesn’t Want to Wait!