Chrissy Teigen and John Legend have announced that they are expecting their second child after another course of IVF. They shared the news on social media this week in a truly special video starring their 19-month-old daughter Luna Simone. We can't get enough of this family.

Chrissy Teigen and John Legend at 'Beauty and the Beast' premiereChrissy Teigen and John Legend at 'Beauty and the Beast' premiere

The 31-year-old model posted about her and her husband's happy news on Instagram yesterday (November 21st 2017) and it seems their little family couldn't be happier - especially it's apparently their final chance to conceive a biological child.

Chrissy asks her daughter in the video: 'Luna, what's in here?', presumably gesturing towards her belly, and Luna correctly responds: 'Baby!' And just in case you missed it, Chrissy clarifies: 'Is it a baby?'

She captioned the video 'it's John's' - y'know, in case we had other ideas. John actually replied back, 'Maury will have the final word on this', referencing the famous talk-show host who did DNA test results on air.

Chrissy recently told InStyle magazine that she wished she had frozen more eggs during fertility treatement, revealing that they had whittled the healthiest embryos down to three. 'The first little girl didn't work, and then the second is Luna', she revealed. Which means the third and final one is currently growing in her womb.

It's not clear how far along they are with baby number two, but John only recently told People - regarding another pregnancy - 'hopefully it will be soon'.

She first met husband John Legend back in 2007 when she appeared in the video for his song 'Stereo'. They got engaged in December 2011, and eventually married in September 2013 in a romantic ceremony in Como, Italy. Luna Simone was born in April 2016.

More: Chrissy Teigen and John Legend are never getting divorced

The couple are extremely open about their love for each other; John even wrote a hit song for Chrissy entitled 'All Of Me', which is probably one of the greatest love songs of this generation.