Guests would also get the chance to ask Sir Gordon questions after his speech.
Mr Marvelly said there had been a lot of interest in the event so far, with more than 200 bookings made.
He expected about 350 people to attend the charity event, which was organised by the Rotary Club of Rotorua.
"Absolutely 100 per cent of the proceeds will go to charity," he said. "It will be a wonderful night and it's for a great cause."
Mr Marvelly said the event was not limited to sports fans but was open to anyone.
Sir Gordon was appointed a member of the New Zealand Order of Merit in 1999 and was promoted to a Knight Companion of the New Zealand Order of Merit last year.
Details
What: An Evening with Sir Gordon Tietjens.
Where: Rotorua Civic Theatre.
When: Tonight. Bar opens 6.30pm, with speech beginning at 7.30pm.
Cost: $35. Tickets available from www.ticketmaster.co.nz or 0800 111 999