2012 Oscars: Kristin Cavallari parades a bigger baby bump as she steps out in first Oscars outfit

'This belly came out of nowhere!': Kristin Cavallari parades a bigger baby bump as she steps out in first Oscars gown

Kristin Cavallari was the first star to step out in her Oscars dress today.

The 25-year-old emerged from her luxury apartment complex in West Hollywood bright and early this morning for the gig of a lifetime as far as her on-screen career is concerned.

She looked delightfully elegant in a grey bandeau floor-length gown and nude Christian Louboutin heels.

Positively stunning! Kristin Cavallari looked radiant as she was the first star to step out in her Oscars outfit early on Sunday morning

Positively stunning! Kristin Cavallari looked radiant as she was the first star to step out in her Oscars outfit early on Sunday morning

The Hills star kept her neckline clear and demanded all eyes on her burgeoning baby bump as she donned the design which feature gathered chiffon around the waist area.

The star was happy to show off the progression of her pregnancy as she headed into a waiting limousine and even raved about her increasing size on Twitter this morning.

She boasted: ‘My stomach literally grew double overnight!! This belly came out of nowhere!’

Ready to glow: The reality TV star showed off her growing stomach in a stunning grey dress and nude Christian Louboutin heels

Ready to glow: The reality TV star showed off her growing stomach in a stunning grey dress and nude Christian Louboutin heels

Ready to glow: The reality TV star showed off her growing stomach in a stunning grey dress and nude Christian Louboutin heels

One on the way: The 25-year-old is pregnant with her and partner Jay Cutler's first child

One on the way: The 25-year-old is pregnant with her and partner Jay Cutler's first child

With her hair done in a gorgeous
up-do by friend of Miley Cyrus, Marcus Francis, and her flawless makeup
achieved with the help of Priscillo Ono, Kristin looked beautiful.

Only
this week the reality TV star – who first found fame on the MTV’s
Laguna Beach – landed herself a spot at the most prestigious awards show
of the year.

On Thursday the star teased about her
latest exciting project before waiting until Friday to reveal she had a
presenting spot at this year’s Academy Awards for E! television.

Groomed to perfection: Her Academy Awards hairdo was perfectly styled by Marcus Francis and her makeup done by Priscillo Ono

Groomed to perfection: Her Academy Awards hairdo was perfectly styled by Marcus Francis and her makeup done by Priscillo Ono

She tweeted: ‘Back to LA for something exciting I'm doing this weekend..will be able to tell u shortly what it is 😉

‘Very excited to announce that I'll be helping host the pre-show for the oscars on E! this sunday!!’

The fiance of Chicago Bears star Jay Cutler and 2011 Dancing With The Stars contestant will present for around an hour at the beginning of the red carpet run-up.

Good news all around: Cavallari teased fans about her upcoming presenting job this week on Twitter and told fans her baby bump had doubled in size overnight

Good news all around: Cavallari teased fans about her upcoming presenting job this week on Twitter and told fans her baby bump had doubled in size overnight