Baby makes three for fitness blogger Kayla Itsines.

The Australian social media star announced the happy news on Instagram with a snap of her fiancé Tobi and the tot.

The health blogger, known for her Sweat app, revealed that they called the little one Arna Leia Pearce.

She wrote, ''I just stared into Tobis eyes the whole time during delivery, nervously whispering “please let her be healthy, please be okay, please be okay” and Tobi kept repeating “I love you so much – she’s going to be healthy it’s okay just breathe it’s okay”.’

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

A post shared by KAYLA ITSINES (@kayla_itsines) on

She continued, ''I am so thankful to have the most amazing doctor and midwives ever to help me. This experience has been amazing for me and I am proud to say that.''

Kayla, who had a C-section also said that it took her a few days to recover from the procedure. 

Tobi also posted an update, talking about how fatherhood has impacted his life already.

Kayla Itsines baby announcemnt

He wrote, ''To be honest, I don’t think any to be mum or dad knows what to expect when entering parenthood for the first time. I expected so many great things and an abundance of learnings, but I couldn’t be more pleasantly surprised by how great this is already. I’ve never felt so connected.''

He added, ''For every couple that goes on the pregnancy journey together, I am sure you can all relate to just how incredible it is, but also how it is hard work and requires a lot of teamwork. Throughout that journey, almost daily I was reminded just how strong and caring Kayla is and I couldn’t be more proud, I just know she is going to be such a great a mum.''

Huge congratulations – enjoy every minute with your gorgeous bundle of joy.