A first look at the campaign circulated this week with the actress wearing black lingerie underneath a white shirt. Fox is seen lying on the bed as she holds a tablet.
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Fox's campaign is expected to launch later this year, which could include both print ads and television commercials.
Fox is rumoured to be expecting her first child with husband Brian Austin Green, but the couple have not publicly confirmed the reports.
She recently cut off an interview with host Steve Jones when the subject switched to her rumoured pregnancy.
Fox previously appeared in Friends With Kids and can be seen next in The Dictator.
Watch the trailer for The Dictator below:
