The Kardashian clan was joined by guests, including Kelly Osbourne, Maria Menounos, Kimberly Stewart, NeNe Leakes and Mel B., to celebrate the new addition, due in July.
The group enjoyed brunch – noshing on pancakes, waffles and fruit – before playing games and guessing baby names. Guests left with wreaths made of baby's breath in their hair.
As for the reality star's beau Kanye West, he did attend after all, arriving with Scott Disick and Lamar Odom.
"Kanye's whole family – all the women from his mom's side and dad's side – attended the shower," a source tells PEOPLE. "Kanye was so excited to have his family be there to join in the celebration with Kim's friends and family."
The mom-to-be, who has been defended by fellow celebs for her sometimes-unconventional maternity style, wore a white long-sleeve pleated dress to the event.
"Kim and Kanye were so cute – he rubbed her belly," Kardashian's aunt Karen Houghton tells PEOPLE. "They're just really blessed. It's such a happy day."
The bash comes a month after Kardashian, 32, enjoyed a family vacation in Greece sans West, and shortly after she finally divorced husband Kris Humphries.
With all that behind her, the reality star can focus on the final task ahead – the delivery – not that she's sweating it.
"At the beginning, that was what I feared the most, and now, I mean, it's inevitable," she told HuffPo. "It's gonna happen – I'm really not worried or nervous."
Kardashian will announce the sex of the baby during the season premiere of Keeping Up with the Kardashians, airing Sunday at 9 p.m. on E!
Reporting by MELODY CHIU and JULIE JORDAN