Britain’s largest family is set to get even larger this month as Millie Radford makes a pregnancy announcement.

Millie, 20, surprised her fans and 57,000 social media followers after revealing she is pregnant with her second child – and he could be born any day now.

Posting to Instagram, the seventh oldest child in the Radford brood shared pictures of herself and daughter, Ophelia.

In the snaps, the one-year-old is holding, kissing and cuddling her mum’s baby bump.

The picture is captioned: “Happy due date little man. Ophelia is obsessed with her little brother already.”

Many of Millie’s fans and followers were shocked by the announcement with many saying “didn’t know” she was pregnant.

One fan said: “I mentioned to my husband after the Christmas blog that you looked pregnant – congratulations”.

“Oh my God, you kept that quiet,” said another.

“Congratulations, I didn't even know,” said a third.

The Radford Family wrote: “So excited to meet him. Just don’t keep us all waiting too long, little man.”

Millie still lives at the Radford family’s 10-bedroom home in Morecambe.

The announcement comes just weeks after big sister, Chloe, made her own pregnancy announcement.

Chloe, 26, made the announcement over on her Instagram page, @itschloeradford_makeup.

In the photo her partner, Jake Wallace, can be seen kissing her baby bump.

The caption reads: "Mum and dad. Feeling blessed, grateful and full of so much love.“We can’t wait to meet our little one this year.”