But before the arrival of their baby, the couple are enjoying a romantic holiday together in Bali.
In a happy snap to Jono’s Instagram on Sunday, Simone showed off her growing baby bump in a white bikini.
The socialite, 30, was all smiles as she struck a pose while wearing a conservative white two-piece.
The blonde beauty held a bundle of towels in one arm as she cradled her growing bump in the other.
Pregnant Simone Holtznagel showed off baby bump in a bikini during romantic holiday with boyfriend Jono Castano as they prepare to welcome a little girl
Jono and Simone’s romantic trip comes just one week after they shared the first ultrasound images of their unborn baby.
The glamorous pair, who are due to welcome a baby girl next March, posted a video clip of one of their ultrasound appointments in Sydney last week.
Simone and Jono, 32, played the Stevie Wonder hit ‘Isn’t She Lovely’ along with the footage.
The celebrity personal trainer also added a red love heart emoji and tagged Simone.
In a happy snap to Jono’s Instagram on Sunday, Simone showed off her growing baby bump in a white bikini
Simone and Jono shared the first look at images from her ultrasound appointment in Sydney last week, ahead of welcoming their first child
Last month, Simone went public with the exciting news that she and Jono were expecting their first child together.
The model revealed in an Instagram post that the couple are due in March next year and they had already decided on a name.
The stunner, who went public with her relationship with the celebrity trainer in 2022, told Who magazine she was overjoyed with the news.
Simone and Jono are clearly overjoyed ahead of the birth, with Jono playing the song ‘Isn’t She Lovely’ by Stevie Wonder over the clip
‘Kids have always been in our plan. We started talking about it more and more and then it just happened,’ she told the publication.
Simone told the magazine she discovered she was pregnant after she felt unusually sick following a holiday to the Maldives to celebrate her 30th birthday.
She decided to take a pregnancy test ‘on a whim’ and it turned out to be morning sickness.
‘The first couple of weeks were a little bit tricky but not as bad as some people have it. We’re very grateful,’ she added.
A 3D graphic from the ultrasound showed the growing baby, with Jono writing: ‘Posing already’. The couple announced the pregnancy last month