Nova's Tim Blackwell, 43, and his much younger girlfriend, 28, break their silence about their relationship as they make their red carpet debut as a couple following his split from his wife

Nova host Tim Blackwell and his new girlfriend Lizzie Baxter have made their official red carpet debut at the 2024 ARIA Awards on Wednesday.

Tim, 43, and Lizzie, 28, couldn't keep their hands off each other as they walked the red carpet and officially confirmed their relationship to Daily Mail Australia.

The couple put on a loved-up display as they embraced one another and posed for photos at the annual music awards ceremony.

Tim exclusively shared they are dating as they surprised onlookers with their arrival.

Lizzie put on a leggy display at the event in a checkered off-the-shoulder mini dress which she paired with racy stockings.

The blonde beauty accessorised with a pair of chunky black heels and silver hoop earrings.

Tim also looked dapper for the occasion, dressed in a velvet suit jacket and matching pants.

The radio star completed the ensemble with a bright red buttoned shirt and a pair of shiny black shoes.

Their red carpet debut comes just one day after Daily Mail Australia revealed their romance when Tim stepped out with 28-year-old Lizzie on Friday.

Lizzie - who is 15 years Tim's junior - is a producer for Nova's Fitzy & Wippa with Kate Ritchie breakfast show.

Joined by their Nova colleagues, the couple stayed close as they attended an intimate 'Red Room' gig at the Coogee Bay Hotel, hosted by rapper The Kid Laroi .

The lovebirds are believed to have began dating after Tim's marriage broke down.

In a flirty exchange on social media, Tim announced he was hosting the awards show and Lizzie asked in the comments if she could be his date for the evening.

'Do you need a date by any chance? You're hot,' she wrote.

'I'll be working. Wouldn't that be unprofessional?' Blackwell responded, before quickly adding, 'I'll think about it...'

Baxter teased in reply: 'Hasn't stopped you in the past.'

A source told Daily Mail Australia the pair have been engaging in flirty online banter for 'a few months' and Lizzie's Instagram account included photos of them as a couple before she recently turned it private.

Another insider added, 'Their relationship is well-known in the industry. It's not really a secret.'

Lizzie works as a content producer for Fitzy and Wippa in the same Sydney office as Tim, who is one third of the national drive show alongside Ricki-Lee Coulter and comedian Joel Creasey.

Tim and Lizzie's date night came almost one year after his estranged wife Monique confirmed they had split.

The former couple share three children, Bo, 11, Alfie, eight, and Artie, five.

Monique, an entrepreneur and yoga instructor, broke the news via Instagram on December 10.

'Not all good things end, but this has,' she captioned a gallery of photos of herself with Tim in happier times.

'Thank you in advance for your messages of love, support and sadness at the news that Tim and I are no longer together.

'Our babes are forever supported by Tim and I's love for them. And our friendship is a source of strength for our family always, as we raise our children as best friends.'

Tim remained silent on Instagram for over a week after his wife's announcement. He wouldn't address his marriage split directly until September.

He opened up about his separation and co-parenting on his podcast, Introducing with Tim Blackwell, during a conversation with singer Missy Higgins.

In a gut-wrenching admission, Tim admitted he felt like a failure as a parent when his marriage to Monique ended - but stressed their story wasn't over yet.

'Especially as co-parents, we're still in the relationship. It just looks different. I think we're working harder on the relationship we don't have anymore,' he said.

Tim and Monique first met in 2002 after he moved to Perth to launch Nova 93.7's drive show.

'It's the cheesiest radio-nerd story ever - one of the biggest days for my career and certainly the biggest day of my love life,' he told Stellar magazine in 2018.

'I had all the big bosses in town, all the news media there. I was shaking and absolutely s****ing myself but also exhilarated at the same time.

'Once all that was over, we went downstairs and had this huge launch party and Monique was a part of the promotions team at the time there. She came over and I got the courage to say, "I'm new to Perth and I'd love to take you out to coffee or something."'