A pregnant Kourtney and other Kardashians come to play

Kourtney and Khloe Kardashian might have taken Miami, but the eldest Kardashian forgot to take something else, and is now pregnant.

"There's so many times I'll forget to take my (birth control) pill,” she told Ryan Seacrest on Thursday. “I know, it's stupid."

Kourtney Kardashian, 30, announced earlier this week that she is expecting her first child with on-again/off-again boyfriend, Scott Disick.

It would appear that the couple is indeed “on” once again.

The expectant mother admitted she was “shocked” when she was told the news.

Though her child is expected in approximately 19 weeks, the soon-to-be-new-mom didn’t go public with the revelation until this week.

Coincidentally enough, the news hit just days before the sisters’ new reality series, Kourtney and Khloe Take Miami, premieres on E!

From sex tapes to pregnancies, you have to hand it to the sisters Kardashian: They sure do know how to get publicity.

Both sisters will sun themselves by the pool at MGM Grand during the hours leading up to the show’s debut on Sunday night.

While their cabana is sure to be fully stocked with vodka, champagne and anything else the hostesses’ hearts desire, chances are pretty slim that the mom-to-be will commit pregnancy faux pas and drink anything alcoholic while lounging at MGM Grand.

This means it may be the juniormost Kardashian sister’s responsibility to make sure the bottle service doesn’t go unappreciated.

It is unclear who else will be joining the reality series starlets in Las Vegas this weekend.

Middle sis Kim Kardashian and their younger socialite brother Brody Jenner are both unconfirmed.

Jenner was in Las Vegas two weeks ago and partied all weekend at the Hard Rock Hotel with girlfriend Jayde Nicole.

The two made a memorable appearance at Body English on Aug. 2 when they made it rain fortune cookies instead of Benjamins.

It also remains to be seen if the recently revealed baby daddy, Disick, will join the mother of his unborn child by the pool this weekend.

All three Kardashian sisters were in Las Vegas in June to celebrate the youngest of the three’s 25th birthday at Pure.

Kourtney Kardashian was pregnant at her sister’s birthday party but didn’t let on that she was expecting.

Afterward, a news release was circulated saying that the birthday girl celebrated her fete “with family and friends as they sipped on Veuve Cliquot champagne and Belvedere vodka” – though it is unknown whether or not the already-pregnant Kourtney Kardashian imbibed alongside the others or stuck to alcohol-free beverages.

The first of the next generation of Kardashians is due “around Christmas,” according to the mother-to-be.

Coincidentally enough, another E! reality show personality, Kendra Wilkinson, is also due to deliver her first child during the holidays.

The former Girls Next Door and current Kendra star on June 10.

Wilkinson knew she was pregnant when she hosted at Wet Republic during Memorial Day weekend but she, too, kept the news on the D/L until later.

Yet that didn’t stop her and now-husband Hank Baskett from sharing their excitement with Wilkinson’s former Playboy Mansion housemate Holly Madison as they played in the MGM Grand pool in May.

Unlike the Kardashians, however, Wilkinson waited until the week after her new reality show aired on E! before she made the announcement.