DreamWorks Animation SKG says Chairman Roger Enrico has resigned, effective immediately.

The movie studio is replacing Enrico, a former CEO of PepsiCo Inc who had served as chairman since DreamWorks went public in 2004, with board member Mellody Hobson.

Dreamworks did not give a reason for Enrico’s resignation in its release today.

The company makes a few big-budget animated movies every year. It’s earlier productions include “Kung Fu Panda” and “Madagascar”.

It signed a five-year distribution deal with News Corp.’s 20th Century Fox in August.

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