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Hilary Duff 's music career isn't "so yesterday" ... the former Disney Channel star is set to release new music for the first time in over a decade.

The "Lizzie McGuire" star shared the big career update on Tuesday, when she uploaded to Instagram photos of herself working on a new EP in the studio. She has signed a new deal with Atlantic Records ahead of the album release.

While Hilary didn't share much about her new album, she did confirm that "new music" was on the way ... teasing that there's plenty more to be expected from the upcoming project.

Hil was likely hinting about the docuseries that is tied to the new album, which was announced alongside Hilary's social media post. Gallery Launch Gallery Getty

The new doc will be directed by and executive produced by Sam

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