She has been keeping her fans updated during her pregnancy.

And Billi Mucklow showcased her blossoming bump by slipping into a scalloped bikini as she made the most of the hot weather in the U.K. on Friday.

The former TOWIE star, 31, who is expecting her third child with footballer fiancé Andy Carroll, beamed as she took a selfie with her son Wolf, two, placing his hand on her tummy.   

Billi, who is also mum to son Arlo, four, showed off her pregnancy curves and rib tattoo in the two piece, which had corset tie detailing at the bust.

Pulling her blonde locks into a high ponytail and donning a pair of shades, the television personality looked ready to make the most of the sunshine, while Wolf enjoyed an ice cream.

She captioned the snap: 'Me & My Babies Suns Out Bump Out'.   

Last month, Billi and Andy announced they were expecting their third child together by sharing a snap of all four children holding up their ultrasound picture. 

Andy has two children Emilie Rose, eight, and Lucas, six, from a previous relationship. 

The former TOWIE star, who has been engaged to the sportsman since November 2014, captioned the black-and-white image: 'Here We Go Again! @andytcarroll - #TeamCarroll #5Aside #LoveMyBabies.' [sic]

The pair were met with praise from Billi's former co-stars, Mummy Diaries' Billie Faiers and newly-engaged Jess Wright, as well as Andy's sports pals, retired footballer José Enrique and Blackpool midfielder Jay Spearing.

The couple, who live with their children in their £5million mansion in Chigwell, have yet to confirm when their baby is due, or the gender. 

Billi and Andy have been together for many years, and became engaged back nearly six years ago when he got down on one knee in Rome, Italy.

While nothing appears to have been arranged, the blonde had previously revealed that the couple were planning to wed in the summer of 2017.

Speaking to OK! magazine at the time, she said: 'I wanted to spend a few months enjoying Arlo as a baby before we started getting busy with wedding stuff. I definitely want a massive wedding, though.'