Holly, who is expecting her first child with billionaire husband Nick Candy, was pictured wearing the monochrome frock in London at a glitzy magazine launch party.
The Australian star's dress was predominately white but had a block of black on the front of the skirt with thin white stripes, hiding her growing tummy.
She wore a tailored black jacket across her shoulders and carried a black clutch bag in front of her baby bump.
Holly teamed her dress with a pair of pointed nude heels and wore her long blonde hair loose, adding smokey eye make-up and a pale pink lipstick.
The former Neighbours actress' pregnancy was revealed in court papers seen by The Mirror newspaper in July.
Holly had attempted to hide her baby news but it was revealed after she failed to to stop an Australian magazine from running pictures apparently showing her bump, the tabloid stated at the time.
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