“This Is Us” actress Mandy Moore stunned fans with an unexpected new look at a recent event, channeling Diane Keaton’s signature style from head to toe.

But while some people praised her vintage look, others resurfaced a growing theory that Moore hasn’t looked like herself in a long time. At first glance, everything seemed normal — until viewers zoomed in and realized just how unrecognizable she appeared.

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Moore wore a cream colored pinstriped suit and a black polka-dot tie with her brown medium-length hair resting on her shoulders.

While her appearance at Elle’s Women in Hollywood event on Nov. 17 drew praise for her outfit, the real buzz

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