Christina Aguilera and Katie Holmes have signed to star together in a new movie.

The pair will team up in family drama Humboldt Park, which will begin shooting in February (08) - just weeks after Aguilera is due to give birth to her first child.

A source says, "(Holmes) is trying to prove she can do more than fluffy popcorn movies", and starring alongside Aguilera "shows she's willing to take risks". (IG/TS/MT)

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