Newlywed Reese Witherspoon Glows at ACMs — With Rob Pattinson!

 Rick Diamond/ACMA2011/Getty Images for ACM

Extra-radiant Reese!

Reese Witherspoon made her first appearance as Mrs. Jim Toth at Sunday's Academy of Country Music Awards in Las Vegas — and the new bride was glowing!

Clad in a sexy black lace Marchesa minidress, Witherspoon, 35, took the stage with Robert Pattinson, her handsome Water for Elephants costar, to present the female vocalist award.

Showing off their chemistry, the duo joshed at the podium. Witherspoon asked Pattinson, 24, what was his favorite part of Elephants' Tennessee shoot. "I like drinking a lot of moonshine," quipped Kristen Stewart's man.

Earlier that day, the duo were in Santa Monica, Calif. doing a press junket for the period film, about a romance sparked on a traveling circus.

Witherspoon joked about locking lips with Pattinson for the flick. "What’s it like to kiss a tall guy? I don't know. In the movies…they put you on a box and then you kiss the tall guy!" See more photos of Rob and Reese at the ACM Awards.

The Oscar winner shows off more of her bod in the film than she's used to. "I sort of made it a conscious effort not to end up in a bathing suit in a movie, and here I was wearing a leotard for the majority of it!" she said.

"[The movie is] was from a different time when women loved their curves and enjoyed being voluptuous, so all the costumes I think are flattering for women in the film."

The star (who wed CAA agent Toth at her Ojai, Calif. ranch March 26 as 150 friends and family looked on), dished to Entertainment Tonight about married life.

"It's good," she said of her first week of marriage. Her one complaint: "Now I'm working. How did that happen?"

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