Kylie Jenner was "obsessed" with her sister Kendall when they were younger.
The 16-year-old reality TV star used to follow her older sibling "everywhere" and the pair - who are the daughters of Kris and Bruce Jenner - were so close they even used to dress identically.
Speaking to Mexico's Marie Claire magazine, Kendall, 18, said: "She was obsessed with me. She followed me everywhere."
Kylie added: "If she got up in the middle of the night, I got up of the middle of the night. I literally couldn't leave her side. We even matched everything we wore."
Kendall - who made her debut at New York Fashion Week and London Fashion Week recently - admitted she has always wanted to be a model.
She said: "Even as a kid, I remember always looking at my mom's magazines, I would look up to them and I thought they were so beautiful and they seemed very elegant and cool.
"It's just something I really wanted to be."
Kylie is planning to pursue a career in fashion design but also wants to try her hand at acting.
She said: "Right now I love designing and I want to pursue that career once I turn 18. But acting is something I would regret not giving a chance when I'm older, so I would love to try it and see if I like it."

Rita Ora showcased her eccentric style as she stepped out in New York City. The singer clashed her quirky cow print backpack with a fur coat and red lipstick.

Kim Kardashian kept warm in a camel coloured fur coat as she stepped out in New York with her fiance Kanye West and daughter North.

Reese Witherspoon added a splash of colour to her casual look with a bright yellow bag as she visited friends in Santa Monica, California.

Ellie Goulding looked stunning in a printed tee and leather trousers as she exited the BBC Radio 1 studios in London. The 'Burn' singer accentuated her natural beauty with simple make-up and slick of pale pink lipstick.

Paris Hilton looked fresh faced as she stepped off a flight at LAX in Los Angeles. The heiress cuddled her pet pooch as she made her way out of the airport.

Jessica Alba clashed her navy striped sweater with a statement red bag as she arrived at LAX airport yesterday.

Britney Spears looked cute in a Disney print tee as she finished her work-out in Thousand Oaks, Los Angeles.

Katherine Heigl hid her face under shades and a baseball cap as she picked up groceries in West Hollywood.

Behati Prinsloo got the giggles as she promoted Victoria's Secret's new T-shirt bra at the Herald Square store in New York.

Rumer Willis sported a cute cropped shirt, leather jacket and retro shades as she ran errands in West Hollywood.

Britain's Prince Charles will tour the Mary Rose Museum in Portsmouth.
The 65-year-old royal and his wife the Duchess of Cornwall are due to visit the £36 million museum in the Portsmouth Historic Dockyard, Hampshire, built near the same site where Charles dived underwater to the see the Tudor warship wreck firsthand almost 39 years ago.
Charles, who is president of the Mary Rose Trust, has been actively following the project surrounding Henry VIII's historic navy vessel since his first dive in 1975.
The heir to the throne was one of the last people to dive down in 1982 before the ship's hull was lifted from the seabed and reunited with the artefacts in the museum.
The Prince of Wales is expected to take a tour of the site and its Stavros Niarchos Learning Suite and will have the opportunity to speak with staff, volunteers and trustees, according to ITV News.
Rear Admiral John Lippiett, chief executive of the Mary Rose Trust, said: "We are delighted to be welcoming their royal highnesses to the Mary Rose and to be able to show them around our new museum. They will meet many of the people who have made the museum project possible.
"His Royal Highness' personal involvement has been fundamental throughout the project's history and we look forward to showing him our achievements. We are especially pleased that Her Royal Highness, The Duchess of Cornwall will be paying her first visit to the Mary Rose."