Heidi Klum's 4 Kids: All About Leni, Henry, Johan and Lou

Heidi Klum has been passing down her impeccable fashion sense to her kids since they were little.

"We have a rule in the house," the supermodel and Project Runway host once said. "Rule No. 1 is always to look cool, and rule No. 2 is don't forget about rule No. 1. We have other rules … but the No. 1 rule is to always look cool."

Her four kids are all adults and teenagers now and they are just as stylish as their mom. Klum shares Leni, 20, Henry, 19, Johan, 17, and Lou, 15, with her ex-husband Seal. The children also spend time with Klum's current husband, musician Tom Kaulitz, who considers himself an "extra dad" to the four kids. They even helped Kaulitz plan his surprise proposal in 2019.

"The sweetest thing that my partner has done for me is [ask] my kids first if he could ask for my hand," Klum told PEOPLE in August 2024. "He was in cahoots with my kids. They figured out how they were going to do it and then they all surprised me on Christmas morning. I thought that was so nice that he involved my kids."

During a February 2023 appearance on the Jennifer Hudson Show, Klum talked about the possibility of having more kids.

"I mean it's a lot. I've done it four times," the model said. "And I breastfed eight months each time."

In January 2024, Seal made a rare public appearance with all four of his children at the Los Angeles premiere of Book of Clarence — a film directed by his brother, Jeymes Samuel. Seal's girlfriend of several years, Laura Strayer, was also in attendance.

Here's everything to know about Heidi Klum's four children.

Leni Klum, 20

Klum welcomed her first child, Leni Olum Klum, on May 4, 2004, in New York City. Leni's biological father is Italian businessman Flavio Briatore — although his and Klum's relationship ended while she was still pregnant. Klum began dating Seal not long after and the couple married in 2005. Seal officially adopted Leni in 2009 when she was 5 years old.

Before she was even born, Leni had a moment in the spotlight. In an Instagram post for Leni's 17th birthday, Klum revealed that she was four months pregnant with her daughter when she walked in the 2003 Victoria's Secret runway show.

"I am not alone walking down that catwalk here," Klum captioned a video from the show. "If I look close enough then I can see you bumping right along at 4 months @LeniKlum. I loved you before you were born, and I will love you long after I close my eyes forever."

These days, 20-year-old Leni is a model herself, which is something Klum made her wait until she was 16 to pursue.

During an exclusive interview with PEOPLE, Leni shared that Klum wouldn't let her model for Brandy Melville when she was 12.

"I was really sad about it, but in the end she was right. And I feel like that's what sparked me to want to model more," she said. Years later, Leni booked her first modeling gig posing for the cover of Vogue Germany with her mother.

She has since participated in many other shoots and has graced the covers of Rollacoaster magazine, Harper's Bazaar Germany and Glamour Germany.

While the fashion world can certainly be difficult for a young adult to navigate, Leni has her mom right by her side to advise and guide her.

"I said to her, at the end of the day you have to be happy with yourself," Klum told PEOPLE of the advice she gave her daughter. "And don't do anything you don't want to do. It's okay to say no. You don't always have to please people. But I'm always with Leni. And she has a very good head on her shoulders."

Leni has also made some red carpet appearances with her famous parents. In October 2021, she and Seal attended the premiere of Netflix's The Harder They Fall together, and in June 2022, Leni and Klum were photographed at the premiere of Jurassic World: Dominion.

In another sweet moment, Leni wore one of Klum's dresses from the '90s to her high school prom in May 2022. She captioned an Instagram post of herself, "Prom night in mamas dress 🖤."

After Leni graduated from high school, she moved to N.Y.C. for college and to continue modeling. And while she knows the city "inside and out," that doesn't mean Klum isn't worrying about Leni back home in L.A.

While chatting with James Corden on The Late Late Show, Klum confessed that she was calling her daughter "every two hours" in the beginning.

"She just moved in, and I call her. Normally she picks up, but then three, four hours I don't hear anything. And already, my head is going 'Where is she? What is she doing? Why is she not answering?' Already the worrying is starting," Klum told Corden.

The former Victoria's Secret model then joked about going to extreme measures if she couldn't get ahold of Leni.

"I want the number of the roommate, so I can bug the roommate if she doesn't pick up," she said.

Still, it seems Leni is doing just fine on her own. On March 4, 2023, Klum praised her eldest for balancing her interior design studies while also pursuing a modeling career.

"I'm very proud of my daughter and her modeling," the proud mom said. "And she's studying at the same time, she's juggling already."

In October 2022, Leni attended her mom's famous Halloween party for the first time. The model dressed as Catwoman, complete with a mask and latex suit. "My kids have never really gone to the Halloween party, obviously, because they're all too young," Klum told PEOPLE. "And now my daughter moved to Manhattan, so she was here. It's her first time coming and she was so excited. She's only ever heard about the stories and seen photos. It's fun for her to be here tonight and it's fun for me to have her here!"

As for her romantic life, Leni has been dating Aris Rachevsky for more than four years, according to Instagram.

Henry Samuel, 19

Klum's second child, Henry Günther Ademola Dashtu Samuel, was born on Sep. 12, 2005, in Los Angeles. Not long after she gave birth, Klum spoke to PEOPLE about the newest addition to her family.

"Everyone who sees him says, 'Oh my god, he looks just like Seal.' And I'm like, 'He has nothing of me? C'mon, there must be something of me in there somewhere.' And they're like, 'No, sorry, he looks just like his father,' " she said of baby Henry at the time.

A few years later, in 2008, Klum revealed that her kids had a giant costume closet and loved to play dress-up. She also shared that then-3-year-old Henry was comfortable experimenting with all the costumes, including his sister's princess dresses. "There's nothing wrong with that," Klum said at the time, admitting that she also thinks the elegant dresses are "more fun than Buzz Lightyear."

The proud mom spoke about Henry's unique fashion sense again in 2011 in an interview with Good Housekeeping. "He lives in his own world," she said. "We went to dinner all dressed properly [and Henry wore dinosaur slippers]. You can barely walk in those things, but for him, it's not weird at all."

Like the rest of her younger children, Klum tries to keep him out of the spotlight as much as possible while he is still a kid. However, the supermodel occasionally posts throwback photos of her younger kids or shots that don't show their entire faces.

When Henry turned 18, the supermodel posted a throwback photo of her giving an infant Henry a bath. "Henry Today you turn 18 🥳❤️ HAPPY BIRTHDAY 🎂," she wrote in the caption. "Look how small you were and now you are 6“3 WOW ❤️ I LOVE YOU WITH ALL MY HEART ♥️."

Johan Samuel, 17

Klum and Seal's second son, Johan Riley Fyodor Taiwo Samuel, was born in L.A. on Nov. 22, 2006. The couple announced the news in a post written by Seal on Klum's website. "He is healthy, beautiful and looks just like his mother," the "Kiss from a Rose" singer wrote of his son. The proud father continued, "To our children, a brother/ To our parents, a grandson/ To my wife and I, a son/ To our family, a blessing."

When he was little, Johan was very artistic and loved to draw and paint. In 2013, his drawings and creativity served as the inspiration behind Klum's children's clothing line. "While the other kids are watching a movie, he'll sit down at his desk for 45 minutes and paint monsters one after another," she told Parents magazine of the then-6-year-old. "So he inspired me to create a line around monsters. Johan's very proud he was a part of it. Sometimes he wears his shirt and tells everyone, 'I painted this shirt!' "

For Johan's 15th birthday in November 2021, Klum posted a video of them together when he was little. She wrote in the caption, "A Heart of Gold and a Mind so Bright. Happy 15th Birthday JOHAN ❤️☀️🎂🥳I am proud of YOU and the young Man you have become."

In June 2021, Klum posted a photo of herself standing between Henry and Johan, both of whom are much taller than her. She captioned it simply, "How did i get so short?"

Lou Samuel, 15

Lou Sulola Samuel, Klum and Seal's youngest child, was born on Oct. 9, 2009, in L.A. At the time of her birth, Seal wrote in a statement, "It's difficult to imagine loving another child as much as you love your existing children. Anyone who has a family will tell you this. Where will one find that extra love? If you love your existing children with all of your heart, how then can one possibly find more heart with which to love another?"

He continued, "On Friday, Oct. 9, 2009, at 7:46 p.m., the answer to this question came in the form of our fourth child and second daughter. Lou Sulola Samuel was born, and from the moment she looked into both of our eyes, it was endless love at first sight."

In a 2021 interview with PEOPLE, Klum shared that her younger daughter is the only one of her kids who seems to have inherited her love of Halloween. The America's Got Talent judge is known for her huge Halloween parties and epic costumes, and she was hoping to pass the tradition on to her kids. However, most of her kids "couldn't care less" about the holiday.

"I was hoping that I would pass this on even to my kids, but out of four, there's only one that really is going for it and that's Lou," Klum said, noting that Lou dressed up as an Anime character that year with "full on makeup, the hair, all the accessories."

Lou also loves to dance and in August 2021, Klum posted a video of her doing a hip-hop routine alongside famous choreographer Miguel Zárate on Instagram.

As with all of her kids, Klum made sure to share a birthday post for Lou. "Happy 14 th Birthday LOU 🥰❤️🥳," she wrote alongside some throwback photos of baby Lou. "I love you with ALL that i got ❤️."