"Me and Scott are expecting our first baby in the summer. We are both so happy and so excited xxx," she revealed.
The actress, who is thought to have a June due date, was spotted showing off her baby bump on a recent holiday in Dubai, cradling her tummy as she chatted to a friend on a beach.
It hasn't all been plain sailing, however. Helen is said to be suffering from bad morning sickness, and has recently been complaining about feeling ill on Twitter.
Me and Scott are expecting our first baby in the summer. We are both so happy and so excited xxx 👶❤️— Helen Flanagan (@helenflanagan1) December 22, 2014
"Nothing better than your mum looking after you when you're feeling ill," she wrote on 2 December, having told her followers a few days earlier that she was "poorly in bed".
Helen and Scott, 25, have been dating for six years, although they Split briefly in 2013.
Helen Flanagan and Scott Sinclair
The I'm A Celebrity star has made no secret of her desire to start a family. "I've always wanted to be a young mum and I now feel ready," Helen told Closer magazine earlier this year.
"It's something I've wanted for ages and Scott's going to be a great dad. I just hope it doesn't take me too long to get pregnant. And I'm not bothered about getting married beforehand."