The cast of 'Good Luck Charlie'.

There's a new family sitcom joining the Disney Channel (Astro, Channel 615) that you won't want to miss. It's called Good Luck Charlie.

It premieres Aug 14, at 9.30pm.

It follows the comedic quandary of teenagers Teddy and PJ Duncan and their 10-year-old brother Gabe when they're unexpectedly designated babysitters for the new baby in the house – Charlotte (aka Charlie).

The whole family is involved in raising the baby and it's up to the older kids to come home after school and take charge of young Charlie while navigating their typical teenage lives.