It's going to be a busy summer in the celebrity baby world, with several stars preparing to welcome a little one into their lives.

Now that Jessica Simpson has given birth to sweet Maxwell Drew -- have you seen her adorable photos? -- let's take a look at some other celebrities who are gearing up for parenthood:

  • Alyson Hannigan: Life has imitated art for the "How I Met Your Mother" star, whose character on the CBS sitcom gave birth this season. Hannigan and her husband, Alexis Denisof, are expecting a baby in June, making their 2-year-old daughter, Satyana, a big sister.

  • Kourtney Kardashian: The eldest Kardashian sister is pregnant again, but this time she and her longtime beau Scott Disick will welcome a darling daughter into their family. Mason as a big brother? Cue more adorable photo ops!

  • Kristin Cavallari: The former "Hills" star-turned-designer and Chicago Bears quarterback Jay Cutler will become first-time parents this summer when Cavallari gives birth to a bouncing baby boy. Then will wedding bells be ringing for the couple? Perhaps, though Cavallari has admitted that they might try for Baby No. 2 before walking down the aisle.

  • Molly Sims: The fashionista is expecting her first childhuffing -- a boy -- with her husband, Scott Stuber, in June. We have a feeling he is going to be one stylish little guy!

  • Snooki: Believe it or not, the rambunctious "Jersey Shore" star will soon have a new nickname: Mommy. Snooki -- whose real name is Nicole Polizzi -- and her fiance, Jionni LaValle, are thinking blue because they are expecting a baby boy this summer.

  • Sienna Miller: The award for coolest mommy-to-be style definitely goes to the British actress, who is expecting her first childhugf with her rumored fiance, Tom Sturridge.

  • Giuliana Rancic: The "E! News" host's dreams are set to come true in August when she and her husband, Bill Rancic, welcome a baby via surrogate in late summer. Are they thinking pink or blue? They are planning to reveal their baby's sex at an upcoming baby shower.

Check out photos of more stars who are expecting this summer and fall below:

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  • Jessica Simpson

    Jessica announced that <a href="http://www.huffingtonpost.com/2012/12/25/jessica-simpson-pregnant-baby-maxwell-photo_n_2362558.html">she's expecting her second baby</a> on Christmas. She and fiance Eric Johnson have a seven-month-old daughter Maxwell.

  • Kate Middleton

    The Duchess of Cambridge is <em>officially</em> expecting her first child with Prince William! The mom-to-be is <a href="http://www.huffingtonpost.com/2012/12/03/hyperemesis-gravidarum-kate-middleton-pregnant_n_2234099.html">suffering from Hyperemesis Gravidarium</a>, a rare maternity condition which brings on severe nausea, vomiting, weight loss, dehydration, lightheadedness and fainting.

  • Fergie & Josh Duhamel

    The couple announced their baby news on Twitter Feb. 18, after weeks of speculation.

  • Penelope Cruz

    The actress is expecting her second child with husband Javier Bardem. The couple already has a 2-year-old son Leo.

  • Evan Rachel Wood

    The actress is <a href="http://www.huffingtonpost.com/2013/01/11/evan-rachel-wood-pregnant-jamie-bell_n_2456954.html">expecting a baby</a> with her new husband Jamie Bell.

  • CaCee Cobb & Donald Faison

    Jessica Simpson's best friend Cacee Cobb and new husband Donald Faison are expecting their first child together. The couple of six years married in December in the backyard of Faison’s "Scrubs" co-star Zach Braff.

  • Tracy Morgan

    The actor and comedian and his model fiancée Megan Wollover are expecting their first child together early this summer.

  • Halle Berry

    Berry is expecting her first child -- a boy -- with fiance Olivier Martinez. She is already the proud mommy of 5-year-old daughter, Nahla.

  • Jamie-Lynn Sigler

    Sigler and her brand new fiance Cutter Dykstra are expecting their first child together.

  • Hilaria & Alec Baldwin

    The couple announced that <a href="http://celebritybabies.people.com/2013/02/12/alec-baldwin-hilaria-baldwin-pregnant-expecting-baby/">they're expecting their first child</a> together. Alec already has a 17-year-old daughter, Ireland, with ex Kim Basinger.

  • Mario Lopez & Courtney Mazza

    The newlyweds are expecting their second child, Mario revealed. “I am the happiest father in the world," <a href="http://www.extratv.com/2013/02/19/mario-and-courtney-lopez-expecting-baby-no-2/">he told Extra</a>. "We cannot wait to welcome baby Lopez number two into our lives.”

  • Mark-Paul Gosselaar

    The "Saved by the Bell" star and his wife Catriona McGinn are expecting their first child together this September. Gosselaar is already a dad to two kids -- son Michael, 9, and daughter Ava, 6 -- with ex-wife Lisa Ann Russell.

  • Jamie Anne and Marshall Allman

    "The Killing" star and the "True Blood" actor are expecting twins in the spring of 2013.

  • Busy Philipps

    The "Cougar Town" star is <a href="http://www.huffingtonpost.com/2012/12/10/busy-philipps-pregnant-cougar-town-star-expecting-second-child_n_2272754.html">expecting her second child</a> with husband Marc Silverstein.

  • Heather Morris

    According to Us Weekly, Heather Morris, 26, and longtime beau Taylor Hubbell are expecting their first child.

  • Ivanka Trump

    Trump and her husband Jared Kushner <a href="http://www.huffingtonpost.com/2013/04/11/ivanka-trump-pregnant-second_n_3060630.html?utm_hp_ref=celebrity" target="_blank">are expecting their second child</a> this fall.

  • Sarah Wright

    Wright and her husband Eric Christian Olsen are expecting a baby boy in August, <a href="http://celebritybabies.people.com/2013/04/17/eric-christian-olsen-expecting-son/" target="_blank">People confirms</a>.

  • Kyla Weber

    Vince Vaughn's wife <a href="http://www.huffingtonpost.com/2013/04/27/vince-vaughn-baby-actor-wife_n_3169237.html?utm_hp_ref=celebrity" target="_blank">is expecting the couple's second child</a> in August. The pair already has a daughter Locklyn.

  • Jaime King

    The "Hart of Dixie" star is expecting her first child with husband Kyle Newman.

  • Rachel Leigh Cook

    The "She's All That" star and her husband Daniel Gillies are expecting their first child this fall.

  • Monica

    Monica is expecting her first child with husband Shannon Brown, but she's already mom to sons Rocko, who turns 8 later this month, and Romelo Montez, 5.

  • Autumn Reeser

    The actress is expecting her second child.

  • Jennifer Love Hewitt

    The "Client List" actress and her boyfriend, Brian Hallisay, are expecting a baby.

  • Kate Winslet

    Winslet and her husband Ned Rocknroll are expecting their first child together.

  • Kim Zolciak

    The "Real Housewife" is expecting her third child with husband Kroy Biermann.

  • Stephen Amell

    The "Arrow" star and his wife Cassandra Jean are expecting their first child together.

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