The band's punchy teenage tunes will once again rock the stage when the Victorian sister-and-brother duo joins the Red Hot Summer Tour in 2020.

And they are coming to Dubbo.

Ella and Jesse Hooper will rock with Hunters & Collectors, James Reyne, The Living End, The Angels, Baby Animals, and Boom Crash Opera.

"We are really honoured to be joining the Red Hot Summer Tour," Ella said.

"We know quite a few of the artists from around the traps, back in the days of the early 2000s."

READ ALSO: Tickets on sale for Red Hot Summer Tour.

Killing Heidi broke up in 2006, but regrouped a decade later for an anniversary tour, an experience Ella said felt "strange and interesting".

"After one or two gigs it was like riding a bike, and I was able to shoot right back into hyper-performance mode," she said.

The band's rare appearances since then have been electric and they have recruited a backing vocalist/keyboardist.

"I am so lucky because the energy we get from the crowd is the energy that I use to build my confidence for the next gig - it has been a very powerful exchange," Ella said.

"I may not have 20 mega hits behind me but I have got a bit of youth and energy about me."

Ella described her brother Jesse as a "fire cracker" on stage.

"He is different on stage compared to his day-to-day personality, it's nice to see him let the wild beast out," she said.

From their album Reflector, songs such as Mascara and Weir spoke to a generation in the mid-90s. And the timeless lyrics resonate with teenagers today.

The band embodied self-empowerment and individualism, in Ella's words, "to be yourself, be who you want and follow your own path".

READ MORE: Red Hot Summer Tour 2020 lineup announced

"It was music for people who don't always fit in or feel a bit odd; for the weirdos and freaks and losers - I think we have always been a band for the outcasts," she said.

"It is still part of our ethos and how we approach our music making, our look and energy."

The music scene has changed since the mid-90s and 2000s, when the band hit the headlines.

"As you get older you learn to appreciate how things were back in the day, but you can see positive changes," she said.

"I think the Australian music scene is in such a good state, it's killing it.

"There's so much more diversity. Women, young people and people of colour are coming out and touring and becoming successful.

"It's not just straight white rock dudes with guitars."

The band's name was "inspired" by Johanna Spyri's 1881 novel, Heidi. That Heidi was everything Ella did not want to be.

"She was a perfect goodie two-shoes," Ella said.

Killing Heidi's counter message was "just let it be, be imperfect and a rat bag if you want to be".

"It's so relevant still."

At 36, Ella doesn't plan on slowing down and is about to release another solo EP - a vintage retro-rock special with a bit of "country twang".

She's keen to see fans on tour.

"We are really looking forward to it," she said.

"It will be such a great day."