It looks like Halle Berry will have to gear up for a custody battle with ex Gabriel Aubry.

The model, who announced his split from Berry last spring, filed court documents last month to be officially declared father of their 2-year-old daughter, Nahla, according to E! News.

Why the official move?

Aubry filed a petition on Dec. 30 to have both joint physical and legal custody of the child, as well as support.

Though it was reported that the couple had split amicably, they apparently kept the courts out of their custody arrangements. Now, Aubry just wants to cover his own rights.

Berry and Aubry dated for five years before separating last spring.

"Gabriel just felt it wasn't working anymore," a source told RadarOnline.com at the time. "When they were first together, the nine-year age difference between them didn't phase him; she was the most beautiful woman he had ever dated, and he was totally in love."