Toni Street celebrates her baby boy's big milestone and has some exciting news ...

Toni Street has shared an adorable snap of her baby boy celebrating a new milestone.

Her little one, Lachie - who was born in August via surrogate - recently turned three months old and the smiley little lad definitely seemed cuffed about the achievement.

Photo / Instagram

Happy three months, Lachie!

• READ MORE: Toni Street reveals how her daughters reacted to their baby brother's arrival

But the celebrating doesn't stop there! We have some exciting Toni news to share ...

While Toni – who is also mother to daughters Juliette and Mackenzie - has been enjoying bonding with her boy while on maternity leave, she is now set to make her return to work.

• READ MORE: Toni Street: I'm not Lachie's mum on his birth certificate yet

That’s right … Toni is coming back on air this Monday! Hooray!!!