Shortland Street star Ido Drent, who plays Daniel Potts, is expected in Rotorua on Wednesday as he attempts a charity run from Wellington to Auckland.
Joining a team of three other runners, including former Rotorua man Jamie Milne of Many Miles for Mary, Drent will tackle the 900km in eight days to raise money for Ronald McDonald House.
His team leaves Turangi at 6am Wednesday and on reaching Rotorua is expected to run along Fenton St, Sala St and Te Ngae Rd between 4pm and 5pm.
They'll leave Rotorua at 6am Thursday to run to Tauranga.
Mr Milne is a former Western Heights High School student and set up Many Miles for Mary three years ago in memory of his late Rotorua grandmother, Mary Milne, who had a huge influence on his life.
Mrs Milne died in the late 1990s after a lengthy battle with Alzheimer's disease.
Many Miles for Mary was a thought, a dream, a grieving process stemming from the day of Mrs Milne's funeral, Mr Milne said on the charity's website.
"At the time of the service I was unable to gather words to describe or farewell my nanny at her passing even though I really, really wanted to.
"So I promised myself that day in some way or form I would always remember Mary and farewell nanny in my own special way.
"So it is with this promise Many Miles for Mary was born."
Mr Milne and others run long distances raising money for various charitable organisations.
Despite his limited experience with distance running, Drent jumped at the chance to take part in this year's event due to the unique nature of the challenge, coupled with the opportunity to support the charity.
"I've never really enjoyed running that much, but this has proven to be an incredible challenge and an opportunity to achieve something pretty remarkable," Drent said.
"Having been to visit Ronald McDonald House in Auckland just recently, I'm amazed at what they do and really hope we can help them in a big way with this event."
To prepare for this gruelling endeavour, the athletes have adopted an unorthodox preparation regime.
Using the training programme CrossFit Endurance, they've completed extensive weight training instead of kilometres of running.
The team members haven't run more than 15km a week to prepare for the 900km run.
Mr Milne said the CrossFit Endurance combined the best of Olympic and power lifting, gymnastics-based training and metabolic conditioning to produce a response on a par with ultra-endurance training.
Ronald McDonald House provides accommodation for families from all over New Zealand who have to stay in Auckland while their children receive treatment at Starship Children's Hospital.
Funds raised will go towards the stage two development of the Ronald McDonald House family accommodation facility called Auckland Grafton Mews.