Heidi Klum and Seal's children are growing up fast.

In fact, their eldest Leni has become a successful model who has shot for major luxury brands andVogue, most recently stepping out at Cannes Film Festival alongside her supermodel mum.

And their second eldest, Henry, is already attending university.

In October 2022, Klum shared a photo of her sitting down and holding hands with her husband, Tom Kaulitz. He sat to the left of her and her son sat to the right.

"Parents teacher night. COLLEGE ROUND TWO," she wrote below the pic.

Here's everything you need to know about how Seal and Heidi have made their blended family work.

How many children do Heidi Klum and Seal have together?

Heidi Klum and Seal have four children together: Leni, 18, Henry 17, Johan, 15, and Lou, 13.

In March 2003, Klum fell pregnant with her first child, Helene (nicknamed Leni), with Italian businessman Flavio Briatore. But it was after the couple split and Klum began dating singer Seal that her daughter was born.

Seal was present at the birth, and according to Klum, raised Leni as his own. He legally adopted her in 2005 when the couple got married.

Briatore was not involved in Leni's life until recently when they reunited in Italy.

"Leni is my natural daughter, but the three of us happily agreed that it made more sense if Seal adopted her because a child needs to grow up in a family," Briatore told Italian newspaper Il Corriere della Sera in 2016.

"Heidi, Seal and I have built an amazing relationship."

Klum and Seal went on to have three children together: Henry in 2005, Johan in 2006 and Lou in 2009.

When did Heidi Klum and Seal split?

In January 2012, the couple announced they were separating after seven years together. The divorce was finalised in October 2014.

Both Klum and Seal continue to co-parent together. However, it isn't always easy.

"It's not all rosy-rosy. It just isn't," Klum told Red last year.

"So sometimes it's hard, but then you have to all come together as a family and sometimes everything is just like hopping on clouds. It's just the way it is."

Watch: Celebrities share their thoughts on parenting. Post continues below.

Is Tom Kaulitz close with Heidi Klum's children?

Four years after their divorce, Klum announced she and Tokio Hotel guitarist Tom Kaulitz were engaged. The couple married in February 2019.

And thankfully, the children and Kaulitz get along.

"You see so many times that someone falls in love and then it doesn't gel as well, so I'm so happy and grateful that everyone is happy with one another," Klum toldRed.

"That he is cool with my kids, my kids are cool with him."

During the pandemic, Klum, Kaulitz and the four children travelled to Germany.