Los Angeles, California - It's official: reality TV star Kim Kardashian has filed for divorce from rap superstar Kanye West, but what caused the Hollywood dream couple's marriage to break down?

According to ET, Kim filed for divorce on Monday, February 22, sealing the end of their relationship.

Kim said there were irreconcilable differences which eventually spelled the end of the couple's marriage.

Now, an insider spilled the beans and told the celebrity magazine that the two still cherish and love each other.

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The source added, "but knew it was time to call it quits."

There is no drama between the two. Neither Kanye nor Kim is interested in creating a scene. On the contrary: the two seem to be working together amicably!

The former couple's top priority is still their children North (7), Saint (5), Chicago (3), and Psalm (1), and Kim even applied for joint custody.

The divorce is not a surprise, as a source told ET that the two had not been intimate with each other for quite a while and were more like friends.

That sounds like a good basis for the coming months, which will surely include some ups and downs.

For now, both stars seem to be struggling with the situation. Kanye, in particular, is said to be "very sad" and struggling badly with the fact that the two "are just not on the same page when it comes to their future as a family."

Kim, on the other hand, seems to be more positive about the future: "She knows she will be OK. It's just going to take some time to get used to her new normal."