To act the part of

to take the character of; to fulfill the duties of.

See also: Act

Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.
References in periodicals archive ?
The young Korean pianist was 'praised for her being a part of the wave of new pianists with an ability to act the part of a star.'
Police decided against using a child to act the part of Rory in the reconstruction.
This book labels Perkins "a victim of the notorious Hollywood closet, forced to act the part of a ladies' man while privately struggling with his own homosexuality." Indeed, Perkins, who married socialite Berry Berenson at 41 and fathered two beloved sons, was tormented by his double life until his death in 1992 from AIDS-related complications.