At the world premiere of her new movie "Life As We Know It" at the Ziegfeld Theater in New York last night, Katherine Heigl walked the red carpet, posed for photographers and talked to the press gathered at the event.

Speaking to Access Hollywood, Katherine explained why she was excited about the movie, which she also executive produced, and talked about becoming a mother just four days before filming began.

Discussing her daughter Naleigh with Entertainment Tonight, Katherine explained that she already seemed to be used to the hoopla that surrounds her mom at a big event like a movie premiere.

The Huffington Post's Samira Nanda was also at Thursday's premiere to talk with the stars about shooting the movie and what it was like working with identical triplets on set.

Katherine, who was joined by husband Josh Kelley and her family at the event, also chatted to reporters about baby daughter Naleigh as she made her way down the red carpet media line.

The BBC asked Katherine about the fame game and she explained that she tried hard not to believe her own press - both positive and negative - as she felt stories about her and those in the public eye are often exaggerated or made more dramatic purely for the sell.

TV Station New York 1 also caught up with Katie and her husband Josh Kelley on the red carpet to talk parenthood and the impact it has had on their lives.

"Suddenly it becomes this crazy reality. It's changed it in every way," said Heigl. "It's given it a perspective I didn't have before, which is what I was hopeful for when I wanted to become a mom and wanted to start a family. I wanted my life to sort of have more significance."

"Everything I do now, I make sure it's for the family and for my kid," Josh added. "You know, you start making time for what you want, and what I want is, you know, a happy family."

The Associated Press also asked the new mother about her own parenting experiences and Katherine shared some of the advice she had been given about bringing up a baby.

Speaking to MTV News's Jocelyn Vena, Heigl explained that a return to her role as Dr. Isobel 'Izzie' Stevens on Grey's Anatomy in the future was unlikely, because she felt the plot would just feel manipulative and calculated.

"I can't think of any way that she could come back gracefully that wouldn't just feel manipulative," she explained. "And, it's hard, because I really wonder what she's doing and where she is and what happened, but that is over for me now."

"I really miss that relationship," Katherine said of her former onscreen romance with Alex (played by Justin Chambers). "Justin Chambers is one of the most amazing men, and certainly a spectacular actor. I feel oddly attached to him, and the character and my character being together. It just seems what's supposed to be, but you can't have it all."

Entertainment show Extra caught up with Katherine at the premiere to talk about making out on the red carpet, hair changes and bad first dates.

Reuter's was also on hand to talk to the stars about the new romantic dramedy and Jason Drew from AP-Red also chatted with Katherine and husband Josh Kelley at the event.

"Life As We Know It" hits theaters on October 8th.