Kristin Cavallari hasn't been shy about showing off her growing baby bump. Last month, the expectant reality star shared a photo of herself getting ready for a shower in Los Angeles, where guests included former "Hills" co-stars Stephanie Pratt, Heidi Montag and Spencer Pratt.

And Friday, Cavallari, who is expecting a baby boy with her fiance, Chicago Bears quarterback Jay Cutler, took to Twitter to share a photo featuring a new green frock from maternity shop A Pea in the Pod.

Cavallari has been positively glowing, and Montag recently told Us Weekly, "She is the most beautiful pregnant woman I've ever seen and I'm very proud of her."

Cavallari, 25, announced that she was pregnant in January. In May, the baby's sex was revealed to the public by Cutler's teammate, Chicago Bears wide receiver Earl Bennett, during an appearance on "The Boers & Bernstein Show" on WSCR-AM 670.

Earlier this year, Cavallari told Glamaholic that she and Cutler were surprised when they learned they were going to be parents, but they couldn't be happier.

"Your motherly instincts naturally kick in," Cavallari said. "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!"

See more stars who are expecting in 2012:

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  • Kendra Wilkinson

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

  • Olivia Wilde

    Wilde is expecting her first baby with fiance Jason Sudeikis.

  • 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.

  • Snooki

    Snooki is expecting her second baby with fiance Jionni LaValle.