The Coronation Street actress, 31, announced she was expecting her first child with fiancé Tom Pitfield in August 2014.
Keeping her followers updated with her pregnancy progress, Catherine shared an image of her huge bump with the caption: ‘Can just about see the telly…#bumptakeover’ over the weekend.
Earlier that day, Tyldsley, who plays Eva in Coronation Street, also revealed that her personal trainer hubby has been giving her foot massages as she goes through the final stages of pregnancy.
Catherine and Tom got engaged in September 2014, just a month after announcing they were expecting.
The actress has previously been dating Matt Baker, though they split in 2013.
With their baby expected any day now, we're hoping Tom and Catherine are enjoying their last moments as an expectant couple.