02/24/2013 11:45 pm ET Updated Feb 27, 2013

Jennifer Lawrence: Best Actress At Academy Awards Announced

Jennifer Lawrence took home the Oscar for Best Actress at the 2013 Academy Awards on Sunday in Los Angeles.

Lawrence won for her role in "Silver Linings Playbook." Also nominated in the category were Emmanuelle Riva ("Amour"), Jessica Chastain ("Zero Dark Thirty"), Quvenzhane Wallis ("Beasts of the Southern Wild") and Naomi Watts ("The Impossible").

Many observers believed the Best Actress race was down to Lawrence and Riva going into Sunday, with Chastain a distant third. Lawrence won Best Actress at the Screen Actors' Guild Awards and the Golden Globes, but Riva won at the BAFTAs. Riva, 86, and Wallis, 9, are the oldest and youngest Oscar nominees in the category's history, respectively.

"You guys are just standing up because you feel bad that I fell," said Lawrence, when accepting the award from Jean Dujardin, who presented.

Meryl Streep won the 2012 Best Actress award for her portrayal of Margaret Thatcher in "Iron Lady."

The Oscars are voted on by members of the Academy of Motion Picture Arts and Sciences, which separates the Academy Awards from other award shows, which are either voted on by the press (Critic's Choice Awards, the Golden Globes) or members of a specific profession (Screen Actors Guild Awards, Directors Guild Awards and Writers Guild Awards).

Seth MacFarlane hosted this year's telecast. James Bond, a "Chicago" reunion, a "Les Miserables" medley, performances by Adele and Barbra Streisand and even Ted were all a part of this year's program and reflected the producers' plan to "trim the fat" from what has been sometimes been criticized as a painfully long and slow ritual.

More information about winners, performances and more can be found in the live blog below the following gallery.

Oscar Nominees 2013

02/25/2013 1:18 AM EST

Good Night, And Good Luck

That's all from the Oscars 2013 live blog here at HuffPost Entertainment! Hope you enjoyed the show. This is Christopher Rosen, signing off.

oscars 2013

02/25/2013 1:07 AM EST

Ben Affleck Is Not Into Oscar Punditry

From backstage at the Oscars:

When did you feel a tipping point in your favor for this film?

Clooney: Michelle Obama.

Ben: When they gave us the trophies I was confident that we would win. I don’t get too much into the Oscar-ology and the pontificating. It doesn’t help me to read up on that stuff.

02/25/2013 1:06 AM EST

Daniel Day-Lewis' Facial Hair

Backstage at the Oscars with Daniel Day-Lewis:

Was it uncomfortable wearing the beard?

What do you mean? No it's just a beard. Do you wear your hair? It was my very own beard.

02/25/2013 12:54 AM EST

What Jennifer Lawrence Thought When She Fell

From HuffPost Los Angeles correspondent Sasha Bronner:

"A bad word. That starts with F."

02/25/2013 12:50 AM EST

Ben Affleck's Best Picture Winner Face

ben affleck

02/25/2013 12:49 AM EST

Patricia Clarkson At The Vanity Fair Oscar Party

patricia clarkson oscars

More on Patricia Clarkson's look here.

02/25/2013 12:44 AM EST

How Movies Change During Oscar Season

Here's Awards Daily blogger Sasha Stone just after "Argo" won Best Picture.

@ AwardsDaily :

See, I told you Argo was Crash incarnate. Won the same amount of awards even.

Here's Sasha Stone on "Argo" back in October:

Have you ever seen a movie where you walk out saying, “That was just a great f--king movie”? That’s Ben Affleck’s Argo. Inexplicably, a film that draws its strength from humor and suspense, winds up being more moving the second time through. Perhaps because once you have been through the suspense part of it you get to know the characters better and therefore care about their outcomes more.

02/25/2013 12:42 AM EST

Ben Affleck's Arc

@ LouLumenick :

Affleck: Oscar winner to laughingstock to Oscar winner. You can't make these things up.

02/25/2013 12:31 AM EST

At Least Someone Liked It

@ m1keh0gan :

Tommy Lee Jones told me Seth MacFarlane was "hilarious." His favorite part? "I Saw Your Boobs." #notkidding

02/25/2013 12:28 AM EST

Daniel Day-Lewis' Meryl Streep Joke

“It’s a strange thing, because three years ago, before we decided to do a straight swap, I had actually been committed to play Margaret Thatcher, um...” he joked. “And Meryl was, was Steven’s first choice for ‘Lincoln.’ And I’d like to see that version. And Steven didn’t have to persuade me to play Lincoln, but I had to persuade him that, perhaps, if I was going to do it, that Lincoln shouldn’t be a musical.”

More on Daniel Day-Lewis' Oscar speech here.