The lovely news was confirmed as Lliana shared a shot of the family in the form of Halloween decorations on their kitchen table.
The couple have seemingly confirmed the new arrival will be called Iggy.
Lliana uploaded an image of four spiders made out of microphone covers which were displayed on the surface.
The 39-year-old told her followers that each spider represented a member of their growing family.
The spiders, featuring pip-cleaners for legs, suggested the mother had welcomed their second child with the GBBO star.
She explained how one spider was her, another Noel, one was their daughter Dali, who was born in 2018, and the fourth was their new baby of the family who she revealed they have called Iggy.
Taking to the caption of the photo, she wrote: “The Bird Fielding family of x x (finally figured out what to do with all my old mic covers!) #halloweencrafts.”
The pair have been together for more than ten years.
They welcome daughter Dali in 2018.
The couple, who have been together since 2010, live North London and have kept their daughter out of the spotlight, and do not share pictures of her on social media.