Kristin Cavallari is positively glowing!

The pregnant star tweeted a photo of herself -- growing baby bump included -- before heading out for a special baby shower in West Hollywood. According to Us Weekly, guests at the co-ed shower included Cavallari's former "Hills" co-stars Stephanie Pratt, Heidi Montag and Spencer Pratt.

Cavallari, who is expecting a baby boy with her fiance, Chicago Bears quarterback Jay Cutler, recently relocated to the Windy City and has been busy getting ready for motherhood. Though she admitted in Glamoholic magazine earlier this year that she and Cutler were surprised when they learned they were going to be parents, they couldn't be happier.

"Your motherly instincts naturally kick in," Cavallari said about learning she was pregnant. "We weren't trying to have a kid but we weren't not trying, we left it up to fate. I knew there was a possibility but I was really excited! Even if you are trying, just to see a positive result is shocking!"

For more details on Cavallari and Cutler's baby shower, head over to Us Weekly.

Check out Cavallari's baby bump below, as well as photos of other stars who are expecting:

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  • Kendra Wilkinson

    The reality star is pregnant with her second child, a baby girl.

  • Melissa Rycroft

    The "Bachelor" star is expecting her second child with husband Tye Strickland.

  • Olivia Wilde

    Wilde is expecting her first baby with fiance Jason Sudeikis.

  • Drew Barrymore

    Barrymore is expecting her second child with husband Will Kopelman.

  • Kelly Clarkson

    Clarkson announced her pregnancy on Twitter Nov. 19, 2013. She's expecting her first child with husband Brandon Blackstock.

  • Ginnifer Goodwin

    Goodwin and her fiance and "Once Upon A Time" co-star Josh Dallas are expecting their first child together.

  • Jenni "JWoww" Farley

    JWoww, who's expecting her first child with fiance Roger Mathews in July, is set to welcome a little baby girl.

  • Kenan Thompson And Wife

    The "SNL" star and his wife Christina Evangelina are set to welcome their first child.

  • Lil Kim

    Lil Kim debuted her baby bump during NYFW on Feb. 12.

  • Christina Aguilera

    Aguilera is reportedly expecting her second child, her first with fiance Matthew Rutler.

  • Jenna Fischer

    The former "Office" star is expecting her second child.

  • Scarlett Johansson

    The actress is reportedly expecting her first baby with fiance, Romain Dauriac.

  • Mila Kunis

    Kunis is reportedly expecting her first child with fiance Ashton Kutcher.

  • Stacy Keibler

    Keibler is expecting her first child with new husband Jared Pobre.

  • Siri Pinter

    Carson Daly and longtime love Siri Pinter are expecting their third child.

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