Kevin and Danielle Jonas are expecting their second baby.

They announced the news in a funny Instagram post, which showed them together in bed surrounded by junk food while Kevin read a parenting book.

The picture was captioned: "Prepping for baby number two! #babyjonas2 (sic)."

And the happy couple told PEOPLE: "We are excited to share the news that we are expecting a new addition to our family this winter. Alena is beyond thrilled to be a big sister and we can't wait to meet the newest member of our family."

Kevin, 28, and Danielle, 29, tied the knot six years ago and have previously revealed that they were keen to expand their family.

When previously asked about siblings for Alena, Danielle said: "We're always talking about it, so it's always there.

"Alena's getting so big! Everybody kept on telling me she's going to get so big, so fast, and I would hate people saying that — but it's so true!"