The main fight at the event, to be held at the SkyCity Convention Centre, is between heavyweights Shane Cameron and American Monte Barrett.
Ridge's interest in boxing may have been piqued during her short-lived romance with All Black Sonny Bill Williams.
She sat ringside during Williams' heavyweight title debacle against Clarence Tillman III, and was photographed with him afterwards.
Ridge has been training with former Warrior Monty Betham, now a boxer.
Betham would not be drawn on what he was training Ridge for, but said they had been working together for about a week.
It is understood Ridge is giving training her all - to the point of vomiting following a run up One Tree Hill.
"Training is going good," Betham said. "She's training really hard.
"It brought a few tears to her eyes on Sunday during [a] really hard session - quite a few tears actually."
"I was hoping there'd be a bit of her father in her - that athletic and mental approach.
"There's a long way to go still, but she's improving.
"I've only worked with her for a week and she's improved in that time. I'm pretty happy with that."
Betham and Ridge have also been tweeting about their sessions.
"Got to go through pain to gain," she said on Twitter after one session.
"Jaime was not only punctual this morning. She was early ... Another session in the bank J," Beetham said later.
It is unclear whether Ridge's gym sessions will be filmed as part of a pilot for a reality TV show also starring her mother, Sally.
