Holly Madison has been hospitalized for morning sickness. Reuters

Former Playboy model and self-proclaimed “smart blonde” Holly Madison has been hospitalized at seven-months pregnancy with an illness similar to Kate Middleton.

The reality star tweeted a picture of herself in the hospital with intravenous tubes in her arms and a floral blanket covering her legs and Converse-clad feet.

It’s the first pregnancy for Madison, who used to be one of Hugh Hefner’s girlfriends at his Playboy mansion.

The former “Girls Next Door” beauty confirmed her Monday hospitalization due to morning sickness on Twitter.

"Almost seven months and morning sickness took hold! Glad to be otherwise OK, though," Madison tweeted.

She later assured her Twitter followers and concerned fans that she was doing well and thanked them for keeping her busy while she was cooped up in the emergency room.

Thank you for all the get-well wishes! Keeping me entertained -- forgot to bring a book with me," the 31-year-old blonde bombshell tweeted.

She’s having her first child with Electric Daisy Carnival founder, boyfriend Pasquale Rotella, Us Weekly reported.

But Madison isn’t the only celebrity that is having complications with her first pregnancy.

On the same day she announced she was pregnant, Kate Middleton was rushed to King Edward VII Hospital in Central London to get treated for hyperemesis gravidarium.

The 30-year-old Duchess of Cambridge was said to have been doing better since she was hospitalized on Monday.

Hyperemesis gravidarium is a rare maternity illness that affects 0.03 to 1 percent of women who are expecting and is characterized by severe nausea, vomiting, weight loss, dehydration, lightheadedness and fainting.

It’s usually treated by bed rest and hydration or, in Middleton’s case, hospitalization.

It has not been revealed whether or not Madison actually has hyperemesis gravidarium; she has been placed in the hospital for complications due to morning sickness.