The Kardashian sisters have earned $1 million in just a few months with news of a romantic breakup, a pregnancy and a wedding. The rest of the show business world is having trouble keeping up with the Kardashians’ astonishing earning power, thanks to their prolific and eventful love lives.

Kim, Kourtney and Khloe‘s antics — and their curvaceous figures — have landed them big-money magazine covers, TV and media deals, as well as sponsorship from diet aid SlimQuick.

Kim split with her boyfriend of two years, Reggie Bush, in July. Kourtney announced she’s pregnant with on-off boyfriend Scott Disick‘s baby in August. And last week, Khloe announced she’ll marry LA Lakers forward Lamar Odom after a whirlwind romance of just a month.

Even their little half-sister, Kendall Jenner, 13, is getting into the act — she landed a contract with Wilhelmina Models in July and is now negotiating an advertising deal.

A source said: “The Kardashian sisters are big business. Their mother, Kris, is a smart businesswoman and manages their deals. She knows how to make the most of these big announcements.

“She’s negotiating a magazine deal for Khloe’s wedding, around $250,000, another deal for Kourtney’s baby, and there will probably be yet another deal when Kim eventually gets back together with Reggie,” our insider said.

“Then there’s the product deals — they’ve already got the fashion line, now they’re branching out into perfume and beauty products.”

The sisters already star in E!’s “Keeping up with the Kardashians” and “Kourtney & Khloe Take Miami,” and the exposure has also upped sales for their clothing line, Dash.