The girl group released their most recent collection On Your Radar back in November, but tweets from band members suggest that they've already commenced work on their next LP.
Rochelle Wiseman posted on the social networking site: "In the studio, need a hot honey and lemon me thinks :)."
Mollie King added: "Why do I record standing on my tip toes ?"
The Saturdays previously confirmed to Digital Spy that they will be releasing their fourth full-length album in 2012.
Speaking about Una Healy's pregnancy, Wiseman explained: "It has fallen at a good time because next year - believe it or not - we'll be working on releasing another album. So it will be writing and recording time out of the public eye."
It was recently suggested that the group would release their Travie McCoy collaboration 'The Way You Watch Me' as their new single, after a listing site claimed the music video was in production.
> The Saturdays perform London show without Vanessa White
Watch the music video for The Saturdays' 'All Fired Up' below: