Exclusive: Lisa McCune on why she 'could not stop crying' ahead of her return as narrator for all-new Big Miracles

EXCLUSIVE: Australian actor Lisa McCune is feeling a lot of things ahead of the brand new season of Big Miracles.

"Overwhelmed" is one of them.

The groundbreaking series follows the intimate and powerful journey of Aussie couples and individuals navigating the raw and emotional road of trying to start a family – through IVF and other fertility treatments.

McCune, 53, may be the "voice in the background" as narrator of the hit doco-style series, but it's a role that admittedly, has touched her deeply.

Watch the new season of Big Miracles from Wednesday February 5 at 9:00pm on Channel 9 and 9Now.

"It's overwhelming at times," McCune told 9Entertainment.

"As I'm talking towards the end of the season when we see the people we've met and we hear their stories, I literally... I could not stop crying."

"They weren't tears of sadness," the actor paused. "They were tears of... the [stories] were just so human and so moving, I was really struck by how that called me out."

READ MORE: Everything you need to know about Big Miracles Season 3

This season will explore even more incredible stories, and see the return of familiar faces including Sheila and Tyson, who captured hearts over the last two years.

Catch a glimpse of the incredible season below:

"Everybody's situation is really unique, yet everybody is striving for the same things," McCune explained.

Returning for her third year as narrator for Big Miracles, McCune said she is still blown away by the "bravery" of the "beautiful people" we've met.

READ MORE: Fertility after 40: Sheila and Tyson's donor egg journey after falling in love later in life

"It's an absolute credit to them. I don't think I could share such a personal story like that, so I really take my hat off to them," she shared.

McCune, who is mum to three kids, was fortunate enough not to go down the road of IVF when it came to falling pregnant. But as a mother, to some extent, she could certainly relate.

"Being pregnant and trying for children, you go into a bubble and it's everything," she said of the emotional and consuming journey that some may face.

"There's one couple who's been trying for a couple of seasons now, Ilina and Nick, they have so much love to give and I watch it for their journey," McCune revealed.

"Ilina is remarkable and the pain she's enduring, it's absolutely everything for her," she sympathised.

"But aren't we lucky for the science we have and the doctors we have and hearing how calm they are about it? They really are extraordinary."

McCune reassured viewers that even though it's a "nail-biting" at times, the series really is a happy story and at its core, hopeful.

WATCH: The incredible moment Ilina and Nick's IVF journey is given fresh hope on Big Miracles

"It's the most basic of human desires, really, having a child.

"Being part of such a beautiful special project that has been taken into the hearts of Australians, it's really a privilege to be apart of it."

Season 3 of Big Miracles premieres Wednesday, February 5 at 9pm on Channel 9 and 9Now.

Watch every episode of Big Miracles on Channel 9 and 9Now.

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