Tiffany Trump joins Donald's three oldest children for rare joint interview extolling their father's sense of humor and insisting they don't notice anything odd about his hair
- Donald Trump's four oldest children sat down with Barbara Walters for a rare joint interview that will air on 20/20 Friday night
- The four talked about their father's infamous hair, with Ivanka noting it is the only hair they have ever known and don't get the public fascination
- Her half-sister Tiffany then said that Donald tells her he is happy she got her mother Marla Maples' hair and not his
- Eric said that he wished the public saw how funny his father is saying that his humor often does not come out when he is speaking on serious issues
- The four were also asked why Ivanka was asked to introduce their father before his speech to announce he was running for president
- They did not have an answer but all agreed she did an amazing job
- See our full coverage on Donald Trump at www.dailymail.co.uk/trump
The four oldest children of Donald Trump sat down for a rare joint interview with Barbara Walters that will air on ABC's 20/20 Friday night.
Siblings Donald Jr., Eric and Ivanka were joined by half-sister Tiffany as they discussed their father's humor, how practical he is and his infamous hair.
'It is funny because it's the only hair we've ever known, and people seem fascinated' said Ivanka.
'To us, it's the norm.'
Tiffany then joked; 'It's funny because my dad always says I'm really happy you got your mom's [Trump's second wife Marla Maples] hair and not my hair.'
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Family time: Donald Trump's four oldest children (l to r: Donald Jr., Barbara Walters, Ivanka, Eric and Tiffany) sat down with Barbara Walters for a rare joint interview that will air on 20/20 Friday night
Coifed: Ivanka (left) said she did not understand the public fascination with her father's hair; Tiffany (right) said Donald tells her he is happy she inherited her mother Marla Maples' hair
All together: Eric and his wife Lara, Donald, son Barron, Melania, Vanessa and her husband Donald Jr., children Kia and Donald III, Ivanka and her husband Jared Kushner and Tiffany after Donald's announcement he would run for president
Eric, 31, also discussed what he believes people in America might not know about his father.
'His humor is one of his best qualities, and it doesn't come across on the news when he's talking about serious issues,' said Eric.
'But he's incredibly funny. He's an incredibly practical person.'
The four were also asked why it was Ivanka who was asked to introduce their father when he announced he would be seeking the Republican nomination for president this past June in a speech at Trump Tower on Fifth Avenue, but no one was quite sure.
'That's an excellent question, and I don't know exactly how it was decided but I was honored to do it and I feel like I was sort of standing there representing our family,' said Ivanka.
Eric then said; 'And she did an amazing job by the way.'
Donald Jr. added to that; 'She's a great messenger, she's got great poise and I think the way Ivanka delivered the message was perfect.'
Oldest son: Donald and his wife Vanessa with their sons Tristan and Donald III and daughter Kai in 2014
Golden child: Ivanka appearing on Saturday Night Live alongside her father (left); and with her husband Jared Kushner (right)
Growing brood: Ivanka announced in September she was pregnant with her third child (above with son Joseph and daughter Arabella)
The oldest Trump children manage to stay just as busy as their famous father, with most of them working for the man.
Donald Jr., 37, is an executive vice president at the Trump Organization, taking a job at the company one year after graduating from his father's alma mater, the University of Pennsylvania.
In 2005 he married model Vanessa Haydon at his father's Palm Beach estate Mar-A-Lago and the couple have five children - daughters Kai, 8, and Chloe, 1,; and sons Donald III, 6, Tristan, 4, and Spencer, 3.
Ivanka, 34, is also an executive vice president at the Trump Organization and also found her way to the company after attending her father's alma mater, the University of Pennsylvania, though she spent her first two years of college at Georgetown.
Unlike her big brother however. Ivanka accepted a job at Forest City Enterprises where she worked for a year before going to work for her father.
In addition to he work at The Trump Organization, she also appeared on her father's former NBC reality show The Apprentice and is a designer and author.
In 2009 she released her book The Trump Card: Playing to Win in Work and Life and has handbag, footwear and jewelry lines she sells under her name.
She married real estate investor Jared Kushner, who also owns The New York Observer, in 2009 at Trump National Golf Club in New Jersey after converting to Judaism.
Her brother's wife Vanessa and half-sister Tiffany were two of her bridesmaids.
The couple have a daughter Arabella, 4, and a son Joseph, 2, with a third child on the way.
Best of friends: Jared Kushner, Eric, Ivanka, Tiffany and Lara Trump at a Republican debate over the summer
One the scene: Eric married his wife Lara in 2014 (above); Tiffany and friends like designer Andrew Warren (above in the Hamptons) are fixtures on the New York social scene
Crew: Tiffany (above with friends) is currently a senior at the University of Pennsylvania
Eric, 31, is an executive vice president at The Trump Organization, where he started work immediately after graduating in 2006 from Georgetown.
He also created The Eric Trump Foundation that same year, which is dedicated to raising money for terminally-ill children at St. Jude Children's Research Hospital.
Eric married Inside Edition producer Lara Yunaska in November 2014 at a lavish ceremony held at his father's Palm Beach estate, Mar-A-Lago.
Tiffany, 22, grew up in California following her parents' divorce in 1999, and is currently a senior at her father's alma mater, the University of Pennsylvania.
She has interned at Vogue, released a pop song and is currently studying to take her LSATs.
Tiffany, like her half-sister Ivanka, is a frequent presence on the New York and Hamptons social scene, and is frequently photographed at events and parties.
The three oldest Trump siblings have long been close, but it has only been since their father hit the campaign trail this past summer that they have been seen with Tiffany.
There is some speculation this may have to do with their father's history with their mothers.
Back in the day: Tiffany shared a photo of herself with her father and mother Marla Maples on her birthday
Donald Jr., Eric and Ivanka with their mother Ivana this past September at a fundraiser for The Eric Trump Foundation
A 1990 Vanity Fair article said that Ivana - the mother of Donald Jr., Eric and Ivanka - had been 'completely humiliated by Donald through his public association with Marla Maples' towards the end of their marriage.
Ivana and Donald would divorce soon after and in 1993 he married Maples - two months after she gave birth to their daughter Tiffany.
The four children also have another sibling, 9-year-old half-brother Barron, who is the son of Donald and third wife Melania.
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