Justin Timberlake and Jessica Biel are ready for baby No. 2 — and they want it to be a girl, a source reveals exclusively to In Touch.

The couple, already parents to son Silas, who will turn two next April, “were struggling to get pregnant, so they’ve recently turned to in vitro fertilization,” the source tells the magazine.

RELATED: Blac Chyna's Dad Reveals it's a Boy For the Model and Rob Kardashian

“With IVF, you can choose the sex of your baby," the source explains. "After thinking about it for a few days, they made the decision to only implant female embryos."

justin timberlake and jessica biel

“It’s always been Justin’s dream to have a little girl — he got really emotional when they told the doctor that’s what they wanted,” the source tells In Touch. “The idea of having a baby girl was melting his heart. He loves being a dad and having a daughter would complete their family.”

For more information on this, pick up the latest issue of In Touch, on newsstands now!

it new cover