So I think one of the important things was not to overact, not to under-react.
From the ocregister.com
Pierce and Ewan did overact Polanski's hyped interaction last evening.
From the guardian.co.uk
She doesn't overact and ham it up as child actors sometimes do.
From the orlandosentinel.com
Even Robert de Niro doesn't overact and that's saying something.
From the metro.co.uk
Their big test was to not overact in a scene where they wet themselves while locked in a freezer.
From the metro.co.uk
She does not overact and we just fall in love with her character.
From the en.wikipedia.org
Think it's impossible to play yourself and still overact the part?
From the time.com
Is this perpetual guilt over his wife's death-or another chance for Andrew Lincoln to overact?
From the entertainment.time.com
Characteristically, Havel's main stage direction during the play is to tell his actors not to overact.
From the time.com
More examples
Exaggerate one's acting
(overacting) hamming: poor acting by a ham actor
Overacting (also referred to as hamming or mugging) is the exaggeration of gestures and speech when acting. It may be unintentional, particularly in the case of a bad actor, or be required for the role. ...