The Geelong season of Death of a Salesman starring Colin Friels and Genevieve Lemon has been postponed due to the lead actor's ill-health.

Geelong Performing Arts Centre has announced this week's six-performance season of Belvoir's sell-out show will not go ahead. The play was due to open this Thursday.

Friels collapsed during Death of a Salesman at Sydney's Belvoir St Theatre on Thursday night after suffering from the flu in the lead-up to the performance.

General Manager Jill Smith said GPAC was working closely with Belvoir to reschedule the season for later in the year and was hoping to announce new dates soon.

"It is with immense regret we announce the postponement of this production and we will be contacting all ticket buyers to advise them of new dates as soon as they are available.

"Of course our immediate thoughts are with Colin Friels - we hope he makes a speedy and full recovery."

Friels's performance as Willy Loman is central to the play. There is no understudy for the role, and Friels is required to be on stage for about two and a half hours for each performance.

The much-loved actor is reported to be recovering well but in need of further rest before returning to the stage.

Belvoir's sell-out season of the classic play by Arthur Miller has been widely applauded by critics and audiences alike. Belvoir had announced an encore season in response to high demand, with the play set to transfer to the Sydney's Theatre Royal in October and November.

GPAC is hoping the Geelong season can be rescheduled some time before or after the Sydney performances. An announcement is expected early this week.