For her very first Oscar appearance, Best Supporting Actress nominee Jessica Chastain went for a Royal look by choosing Kate Middleton's wedding dress design house, Alexander McQueen, for her gorgeous red carpet gown!

Chastain, who is nominated for her work in The Help, accessorized with Harry Winston jewels, and brought along her grandma Marilyn as her date!

Unfortunately, Jessica lost out on the Oscar to her Help costar, Octavia Spencer.

Viola Davis looked picture perfect in her custom green Vera Wang dress as she walked the red carpet with husband Julius Tennon. The bejeweled bustline is definitely fitting for the star-studded event.

Ms. Davis also flaunted her Lorraine Schwartz jewelry, Judith Leiber clutch and Jimmy Choo heels. Workin' it!

The 46-year-old actress, who is nominated in the Best Actress category for her role in The Help, is up against Rooney Mara, Meryl Streep, Glenn Close and Michelle Williams.

Yikes! That's some stiff competition. May the best woman take home the golden statue.

Taking the plunge in a dazzling ivory Givenchy gown with a deep V-neckline and sparkling Fred Leighton jewels, Oscar nominee Rooney Mara took our breath away when she arrived at the 2012 Oscars in Hollywood, on Sunday.

The 26-year-old actress is nominated for her role as Lisbeth Salander in The Girl with the Dragon Tattoo, but she's got some stiff competition tonight!

Mara recently revealed to USA Today of the sole requirement for her Oscar dress, "I don't think about it [choosing a dress] in terms of what people say or like or think. I try to find something that I feel comfortable in. I do like fashion, but if it's not comfortable, I won't wear it."

Ashley Tisdale and boyfriend Martin Johnson are continuing their nouveau grunge theme ... with matching all-black ensembles for a coffee run.

We pointed out the other day, how Ash has adopted her b-friend's style (like Jennifer Aniston copped her boyfriend Justin Theroux's look). But we'd like to point out how the young fashionista adds a twist to the look with a fire engine-red Chanel bag! What Roxy regular would carry THAT down the Sunset Strip?!

Amy Adams took daughter Aviana out with baby daddy Darren LeGallo, on Saturday. Amy's daughter was excited about a squirrel she saw in the distance ... adorable!

Aviana was named after Adams' birthplace in Italy. Her father was stationed abroad, before returning to the US and settling in Colorado with Amy's six siblings.

Another interesting fact ... while Amy was a struggling actress, getting her start in Atlanta, she held part-time jobs at The Gap and at Hooters! She quit after three weeks and later described the experience this way: "... there was definitely an innocence to my interpretation of what Hooters was about. Though I did learn, quickly, that short shorts and beer don't mix!"

With her new, cropped 'do and her cropped cigarette-style jeans, heels and leather jacket, Cameron Diaz is certainly workin' it!

The actress grabbed a coffee after a hard night of pre-Oscar partying at the CAA shindig Friday night.

What do you think of the 39-year-old's new look?

After announcing her split from hubby Seal a month ago, Heidi Klum has finally removed her wedding band.

We caught the supermodel mom picking up daughter Leni from ballet Saturday and as she carried younger daughter Lou in her arms, her left hand was clearly without her usual rings. Guess it's official!

The Independent Spirit Awards were held Saturday in Santa Monica -- a precursor to the Oscars, but not always a good barometer of who will win Sunday night.

As their name implies, the Indie Awards are focused on "artist-driven filmmaking" and "independent thinkers."

Still, The Artist was the big winner yesterday - taking the prize for Best Feature and Best Actor, for Jean Dujardin. The film has led all the awards events so far, so we imagine Harvey Weinstein and Dujardin are preparing for a win tonight!

Michelle Williams picked up the other big award yesterday, for Best Female Lead in My Week With Marilyn.

The awards were hosted by Seth Rogan, who recently picked up a significant award himself -- the actor was named Stone of the Year by High Times magazine ... congrats, Seth!

Here's a full list of the other winners:

Best Feature – The Artist

Best Male Lead – Jean Dujardin, The Artist

Best Female Lead – Michelle Williams, My Week With Marilyn

Best Supporting Male – Christopher Plummer, Beginners

Best Supporting Female – Shailene Woodley, The Descendants

Best Director – Michel Hazanavicius, The Artist

Best First Feature – J.C. Chandor (director) - Margin Call

Best Screenplay – Alexander Payne, Nat Faxon, Jim Rash – The Descendants

Best First Screenplay – Will Reiser, 50/50

Best Cinematography – Guillaume Schiffman, The Artist

Best Documentary – Steve James (director) – The Interrupters

Best International Film – A Separation (Iran)

Piaget Producers Award – Take Shelter

Robert Altman Award – Margin Call

John Cassavetes Award – Dee Rees (director), Nekisa Cooper (producer) – Pariah

Audi Someone to Watch Award – Mark Jackson (director), Without

Nokia Truer Than Fiction Award – Heather Courtney (director), Where Soldiers Come From