Kristin Cavallari is pregnant with her first child, and this petite star will probably not be showing for awhile! She and her fiance Jay Cutler have been together since August 2010 and announced the pregnancy over the weekend.

Ms. Cavallari, wearing a stunning black trench and black tights, was all smiles as she left the Petit Ermitage hotel in West Hollywood.

The blonde fashionista might as well enjoy wearing her Christian Louboutin boots now because soon enough, she'll be trading those in for some flats. Well, unless she pulls a Victoria Beckham and rocks stilettos until her due date.

See more of Kristin's first appearance since announcing her pregnancy in our gallery below.

Reese Witherspoon and Jim Toth can't get enough of each other!

The Oscar-winning actress and her hubby took a leisurely stroll in LA over the weekend dressed casually and acting low-key. Reese even seemed to have moments of embarrassment over all the attention. Come on, girl ... we'd think you'd be used to that by now.

Looks like Ava and Deacon gave their mom and stepdad some alone time. Now THOSE are great kids!

Taylor Lautner, looking tough in a backwards cap and leather jacket, took in a performance of the Cirque du Soleil show "Iris - A Journey Through The World of Cinema."

The Twilight hunk even posed with the cast backstage after the Hollywood performance.

Lautner will soon be promoting his action flick Abduction ... in which he plays the leading man hoping to save the world. Could Tay be the next Tom Cruise? We'll be watching to find out.

Victoria Beckham covers the March issue of the Japanese edition of Numéro magazine, and the former Spice Girl strikes a sexy pose in a turquoise leather trench coat by Burberry Prorsum. And with the coat's $4,655 price tag, it seems like this is quite appropriate for the Posh one!

Speaking of the Spice Girls, it looks like rumors of their reunion for the 2012 London Olympics are just wishful thinking at this point. A rep for the group reportedly told The Daily Mail, “I am not aware of the Spice Girls doing the Olympics - there are always interesting offers that come in for the girls to reform and perform, but as you know they are busy with other careers, wives, mothers etc and these things take a lot of time, planning and commitment ... If a great opportunity came along I'm sure each of them, Victoria included, would give it due consideration but I am not aware of any plans for them to perform together at this time.”

Jennifer Aniston is putting her acting career on the backburner in the hopes of becoming a mom, according to Daily Mail.

A source close to the 42-year-old actress tells the site Aniston has not booked any movies in the "forseeable future" ... telling her agents "she needs a break."

The source adds:

"She wants to focus on herself and hopefully becoming a mother. She is thinking of launching her own fashion line which would allow her to spend more time at home."

Various online reports have speculated that the Friends star is already pregnant with beau Justin Theroux's baby.

The actress' rep has yet to issue a comment.

Tracy Morgan is currently being hospitalized at the Park City Medical Center in Utah after he collapsed at a Sundance Film Festival event on Sunday night.

Morgan's rep tells Us Weekly, "From a combination of exhaustion and altitude Tracy is seeking medical attention. He is with his fiancee [Megan Wallover] and is grateful to the Park City Medical Center for their care. Any reports of Tracy consuming alcohol are 100 percent false."

Morgan was accepting an award at the Creative Coalition Spotlight Awards, and shortly after giving his speech, he collapsed and was rushed to the hospital in an ambulance. Morgan suffers from diabetes, and despite reports that he was intoxicated at the event, it seems like he just needed a little bit of R&R!

Simon Cowell is reportedly furious after finding out that the BBC is going to broadcast the UK version of The Voice at the same time as Simon's show, Britain's Got Talent.

Simon apparently told The People, "It is 100 percent a declaration of war. They have gone head-to-head with us -- it's their decision. We'll make it a competition." Meow!

Simon recently upped the prize money on Britain's Got Talent from 100,000 to 500,000 pounds, and he even brought in new judges. The UK version of The Voice is set to air this spring, and mentors include Tom Jones, Jessie J, Will.I.Am and The Script's Danny O'Donoghue. The competition series is based on the mega successful US version of the show, so perhaps Simon feels a bit threatened?

Talk about a sexy snow bunny! Kate Bosworth cruised through the falling snow while taking in the Sundance Film Festival in Park City, Utah.

Ms. Bosworth is currently promoting her latest film Black Rock at the annual festival.

The long black coat and boots are perfect for the snowy conditions, but the jeans ... not so much. If those get wet, could make for an uncomfortable day!

See more of the celebrities who are chillin' in Park City in the gallery below.