United Kingdom, May 18 -- Jesy Nelson has given birth to twins.

The 33-year-old pop star has announced via social media that she and her partner, Zion Foster, have welcomed twin daughters.

The former Little Mix star wrote on Instagram: "So. Our beautiful baby girls decided to come at 31 weeks plus 5 days. It all happened so quickly, but we are so blessed that they are here with us, healthy and fighting strong! We've never felt more in love.

"Everybody meet Ocean Jade Nelson-Foster and Story Monroe Nelson-Foster. (sic)"

Jesy's Instagram post also included photos of herself and Zion cradling their baby girls.

The singer was previously diagnosed with twin-to-twin transfusion syndrome, which can put one or both babies at risk. And in Mar...