Sam Mac announces third baby, takes jab at Kyle!

 is set to become a father for a third time.

The Sunrise weatherman announced that his fiancée Rebecca James was pregnant on his Instagram account on Wednesday, and .

Rebecca revealed her baby bump, which Sam kissed as he held a set of sonogram images.

Meanwhile, Rebecca held on tight to little Mabel while sporting a joyous expression, as Margot clutched a cookie and watched on.

Captioning the sweet image, Sam revealed that baby number three would arrive in just four months.

'Baby Mac coming this July,' Sam wrote.

He added that the biggest hurdle with the announcement was coaxing Margot to cooperate in the photo.  

'The negotiations involved to get a three-year-old to appear in a photo…Wowsers!' he wrote.

'You’ll notice a bribery cookie, we had a bubble machine, I think at one point I even promised Margot a pony. But we got there!'

Sam continued: 'Bec is doing so great & Mabel is super excited to get her turn at being a big sister! Bring it on.'

The post was met with an outpouring of congratulations from friends and followers.

Reality TV veteran Reggie Bird chimed in with an excited: 'Oh good on ya’s, that’s awesome guys.'  

Sam's Sunrise co-star Natalie Barr also offered her best wishes with: 'Triple Mac!! Amazing news,' while Edwina Bartholomew also added: 'This is the best news.'

Sam also let Sunrise viewers in on his secret on Wednesday, which was also news to hosts Natalie Barr and Matt Shirvington.

Both Nat and Matt were clearly surprised and overjoyed at the news, with Matt asking Sam if he and Bec were planning on learning the baby's gender before birth