Katherine Heigl, co-star Rosario Dawson and director Denise Di Novi attended CinemaCon at The Colosseum, Caesars Palace on March 29, 2017 in Las Vegas, to promote the April 21 release of their thriller Unforgettable in theaters.

Katherine Heigl - Unforgettable

The trio were part of Warner Bros. Pictures presentation of their upcoming slate of films at CinemaCon, the official annual convention of The National Association of Theatre Owners.

Katherine's red carpet look for the event included a Chloe top, pants and bag, earrings by Randall Scott Fine Jewelry and rings from Graziela Gems. Speaking to reporters at the event she revealed that it was her first night away from her newborn son, Joshua Jr.

"This is the first time that I have left him. He's just a little over 3 months now and I'm just here for one day and I thought, 'You know, it's irresponsible of me to, like, disrupt his whole schedule for one day just because I have an issue. He's totally fine without me and I have a problem, so I'm trying to be the grown up here and make the right decision on his behalf," she said.

Baby Joshua was not the only child her on mind. "I should have moved things along because I was late and I needed to get going to make sure I got my flight this morning, but my middle child, who used to be my baby, gave me this rare like snuggle session this morning,"l she gushed of 4-year-old Adalaide. "lShe's not much of a snuggler, like, she's more of a daddy's girl, and she'll come to me for a kiss or two, but never really snuggle snuggles. So I got that this morning too, so now I'm feeling especially sad and missing my babies."

"That's pathetic...this is ridiculous! It's one night!" the mother of three confessed. "Be more than mom for the evening! I'm in Vegas!"

Katherine Heigl - Unforgettable

Katherine also shared what it was like to play psychotic stalker Tessa Connover in her new movie with ET Canada's Matte Babel, describing her character as "off the scale" crazy.

Katherine Heigl & Denise Di Novi Katherine Heigl & Denise Di Novi

Hair stylist David Babaii shared a photo of Katherine backstage as he dressed her hair for the event, which would see her, Rosario Dawson and Denise Di Novi take to the stage to talk with the audience and introduce them to Unforgettable.

Katherine Heigl Hair
Katherine Heigl, Rosario Dawson & Denise Di Novi