Ivanka Trump Says She Will Not Fill In as First Lady

President-elect Trump's elder daughter spoke about her father's transition into the White House and her family's move to Washington.
5:22 | 01/20/17

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Transcript for Ivanka Trump Says She Will Not Fill In as First Lady
In her speech at the Republican national convention, Ivanka Trump promised American women she would fight alongside her father in Washington for labor laws that would ensure equal pay for equal work and access to affordable childcare for working mothers. We spoke with her on the precipice of her new life in Washington, about how she plans to make her mark as first daughter. Reporter: You could say that Ivanka Trump's life has prepared her to become a first daughter. More diamond than denim, with the beauty to work as a model and the brains to earn know economic degree from Wharton. She's clearly the apple of her father's eye. Reporter: Who is his favorite? I'm going with ivanka. Reporter: This week, 35-year-old ivanka is in a whirlwind. Days before inauguration, she invited me and our ABC news cameras, to her offices in trump tower on fifth avenue, now an armed fortress. Welcome. Reporter: Thank you. So this is brand-new? Brand-new. We just moved into this one. Reporter: It's likely to be one of her last visits for a while. In true trump fashion, she's firing herself. Stepping away from the trump organization and her own apparel and accessories business. ??? Happy birthday ??? Reporter: She and husband Jared Kushner, along with their three young children are moving into a $5.5 million home in one of Washington's most exclusive neighborhoods, just around the corner from the Obamas' new digs. What are you saying about grandpa's new job? I tell them that their grandfather is going to Washington, D.C. With the goal of helping as many people as he possibly can. Grab an apple. Reporter: She's known to share private family moments on social media, the nurturing side of Washington's newest power couple. You like that. Reporter: After her father's announcement in June 2015, ivanka became a tireless booster for her billionaire dad. A regular on the campaign trail. That tight dad-daughter bond, coupled with news that trump's wife Melania and son Barron, won't move to Washington right away has fueled speculation about ivanka's role. People are saying that you're essentially going to be the first lady. There's one first lady, and Melania will be an unbelievable first lady. She's a remarkable person. Jimmy: W Reporter: Will you have a office in the first wing? Today my focus is really just moving to Washington, traveling around the country, and listening. Reporter: She says she's still figuring out her role, but it's clear Jared, her husband of seven years, will be a key player. Like his wife, Jared knows a life of privilege. A Harvard grad, he too comes from a family who made a fortune in real estate. A lot of people don't know your husband. Give us a sense of who he is. He's a remarkable human being. He's kind and thoughtful, and he's an unbelievable father. Reporter: Kushner, named as senior white house adviser is about to become one of the most powerful men in the west wing. When meeting ivanka, there's no denying her diplomatic skills. Despite the ice cold tension between her dad and Hillary Clinton, when they wouldn't even shake hands during the second debate -- ivanka and Chelsea Clinton had a warmer moment. She's a very good friend of mine. She's been a friend of mine long before the campaign. Reporter: Are you still friends? Of course. I haven't spoken about the specific challenges about this next chapter with her just yet, but I intend to. Reporter: Details matter to Ivanka Trump. She's even writing a new book -- women who work -- as a guy to help women achieve success. Book proceeds will go to charities for women. Critics are quick to point out the irony. Reporter: You know there's going to be a March with a lot of women who feel that your dad is going to turn back the clock. What do you say to them? I say, give my father a chance. I think what he's shown his entire life is his support and advocacy of women. Reporter: Her father also ignites controversy with his shoot from the lip tweeting. Your dad has become known for relentless tweeting. Do you ever say to him, knock it off, let it go? Sure. Reporter: You do? Sure. Reporter: Does he listen to you? Depends on the day. Reporter: We're in a divided nation right now. Does it trouble you that there are a lot of people who are fearful of your dad's presidency? For every critic, I would say give him time. Let him come into office. Let him prove you wrong. Reporter: Your dad's speech will probably be more important than any one he's ever given. Do you have a sense of what he's going to say? Just like his speech on election night, it will focus on unity, on optimism, and on the future. Reporter: Ivanka Trump's life is about to change dramatically, but she says, not completely. Friday after he's sworn in, is he dad, is he Mr. President, what are you going to call him? He's always dad. Reporter: For "Nightline," I'm Deborah Roberts in New York.

This transcript has been automatically generated and may not be 100% accurate.

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