Chastain, a best-actress contender for “Zero Dark Thirty,” blew a kiss to cheering fans while wearing a glistening copper-tone strapless gown, who chanted “Jessica!” while hunky best-actor nominee Bradley Cooper of “Silver Linings Playbook” drew some of the loudest screams from fans. Amanda Seyfried revealed she was wearing a corset: “I feel super tucked in,” she said.

Composer Mychael Danna, a dual nominee for the score and theme song to “Life of Pi,” joked with red-carpet host Chris Connelly that he was keeping his acceptance speeches in separate pockets of his tuxedo.

Keeping them straight, Danna said, “is one of the reasons I won’t be having any cocktails before I go in.”

Nine-year-old best-actress nominee Quvenzhane Wallis of “Beasts of the Southern Wild” sang a few bars of “Tomorrow” from “Annie,” the upcoming movie musical whose title role she snagged in an announcement from Sony Pictures earlier Sunday. She wore a navy-blue dress with black, navy and silver jewels scattered on the skirt and a big bow on the back.

Lawrence was bleeped long before the show even started when ABC silenced her cheeky red-carpet response to actress Kristin Chenoweth. The two were bonding, when Lawrence asked Chenoweth if she liked it too. Chenoweth asked, “Is the pope Catholic?” Lawrence said something about what a bear does in the woods.

Chef Wolfgang Puck showed off some of the eats he’ll be serving at the governor’s ball after the show, including baked potatoes with caviar, smoked salmon oscars, chicken pot pie with truffle and kobe steak.

“It’s going to be the greatest party ever,” Puck said.

A giant black-and-white photo of Oscar host Seth MacFarlane towered over the carpet, and some of his family also were among early arrivals, including his sister and father, who wore a green plaid kilt.

“It’s not going to be too over the top,” said MacFarlane’s sister Rachel of her sibling’s gig.

Fans have pondered how far MacFarlane the impudent creator of “Family Guy,” might push the normally prim and proper Oscars.

MacFarlane may be a wild card, but as for the show itself, predictability could be the Academy Awards’ middle name. This time looks the same, with clear favorites in the main categories.

So Oscar organizers hope they’ve assembled a show that will be good time on its own performance merits, with wily, bawdy writer, director, animator, singer and all-around vocal talent MacFarlane as host and a ceremony packed with song and dance.

The awards themselves do hold some potential firsts and other rarities.

Ben Affleck’s “Argo” looks like it will be an uncommon film to claim best picture without a directing nomination, while “Lincoln” filmmaker Steven Spielberg and star Daniel Day-Lewis are favored to join exclusive lists of three-time Oscar winners.

Affleck was not counting on anything, though.

“We don’t expect to depart with anything but our integrity,” Affleck said on the red carpet.