Chrissy Teigen may be one of Twitter's power users, but she shared some big news today via Instagram. She's expecting a second child with husband John Legend. Though, it was actually big sister-to-be Luna Simone Stephens who got to break the news. In the Instagram video, Teigen films Luna crawling around and when the child finds her way to Teigen's stomach she asks, "Luna, what's in here?"

"Baby," replies the year-and-half-old Luna.

"It's John's!" read the accompanying caption. As if there was any doubt.

Teigen, never known for holding back, has been public about her desire for a second child recently. When asked by E! News if she one day wanted to have another child at an event in Los Angeles in early November, Teigen revealed she was indeed "working on it."

"I feel good, I feel good, we're still trying...I'm going for I mean hopefully in the next few years because for me I really want to just knock 'em out," Teigen said. "That's my dream, I want to just be pregnant kind of for the rest of my life." She quickly clarified that she meant the "rest of my fertile life."

View this post on Instagram

it's john's!

A post shared by chrissy teigen (@chrissyteigen) on

People also reports that when Legend was recently asked about a second child, he replied “hopefully it will be soon.”

Though, when it came to his wife's announcement and assurance that it was his on Instagram, he hopped into the comment section to write, “Maury will have the final word on this."

Legend and Teigen began dating in 2007, and tied the knot in 2013. First daughter Luna was born in April, 2016.

Incidentally, the news broke on the same day that Teigen was named one of the highest earning models in the world.

Related: John Legend on Gender Equality, Harvey Weinstein, and How His Relationship With Chrissy Teigen Changed Him

The Beauty Secrets of Chrissy Teigen and Other Supermodels: