It鈥檚 an exciting time聽for Chrissy Teigen and hubby John Legend. The聽couple just revealed that they鈥檙e expecting baby No. 2! And they聽shared the聽news聽with the help of their adorable 18-month-old daughter, Luna.

The 31-year-old聽model聽took to Instagram today to make the big announcement.聽In a video of herself and her little one,聽Teigen gestures聽to her stomach聽and asks, 鈥淟una, what鈥檚 in here?鈥 The toddler sweetly replies, 鈥淏aby!鈥 Happy laughs can be heard in the background as the聽sweet soon-to-be big sister looks at her mom鈥檚 belly and continues to say, 鈥淏aby.鈥

Teigen聽captioned the video using her ever-cheeky sense of humor, joking, 鈥淚t鈥檚 John鈥檚!鈥

it's john's!

A post shared by chrissy teigen (@chrissyteigen) on

The cookbook author and the 鈥淎ll of You鈥 singer revealed back in October that they were ready for their second child, which they were聽hoping to conceive with the help of IVF.

Teigen has been incredibly open about her fertility struggles in the past. As she told聽InStyle,聽she started with 20 embryos during their first IVF round, and though three were viable, she explained, 鈥淭he first little girl didn鈥檛 work, and then the second is Luna.鈥

This time around, she told Entertainment Tonight, 鈥淥h my god, a little boy is next for sure.鈥

We can鈥檛 wait. Congratulations to the growing family!

Are you excited that Chrissy Teigen and John Legend are having a second baby? Let us know @BritandCo!

(Photo via聽Frazer Harrison/Getty)