The Wanderlust costars, who became engaged in August 2012, held each other close while posing for photographers. Aniston, 44, wore a stunning, red strapless Valentino dress from the Spring/Summer 2013 Haute Couture collection. She accessorized the look with a Salvatore Ferragamo clutch and Fred Leighton jewels, and wore her hair down and straight. Theroux, 41, looked handsome in a Salvatore Ferragamo suit and bowtie, which Aniston helped him adjust on the carpet.
"It feels very princessy. I feel like this is very King and I," Aniston told ABC's Lara Spencer on the carpet of her dress. When mentioning her jewelry, Aniston said the designer of her ring was "my fiance."
"Today was really nice, I have to say," Aniston said of getting ready. "We had a really fun morning and a great breakfast."
Does the couple plan to attend any after parties? "No, we don't," she said. "That's a lot of action."
But the Oscars may be a good date night for the couple as Aniston has been busy working on back-to-back films We're the Millers and the Untitled Elmore Leonard Project.
"When it rains, it pours," Aniston, who is presenting at the show, recently told Women's Wear Daily. "I'm having a ball. I'm loving this movie, and [busyness] isn't bad, because I'm enjoying myself."