Heidi Klum will file for divorce from Seal ... TMZ has learned.

[caption id="attachment_5030" align="alignleft" width="300" caption="Happy families: The couple have four children, Leni, seven, Henry, six, Johan, five and Lou, two"][/caption]

Sources with direct knowledge tell TMZ ... Heidi will file divorce papers in L.A. County Superior Court as early as next week. We're told Heidi will cite "irreconcilable differences" as the cause for the divorce.

The couple married May 10, 2005. They have 3 biological kids. Seal adopted Heidi's eldest girl from a prior relationship. The couple is famous for renewing their vows every year on their anniversary ... in a lavish ceremony.

As for splitting up the goodies, there's a lot on the line. According to Forbes, in the last year alone, Klum raked in $20 million. It's unclear how much Seal made.

Heidi attended last Sunday's Golden Globes without Seal. The last photo she tweeted with him was back on December 26.

Source at TMZ