"Right now they are just enjoying the news for themselves," a source told Us. "They just want a happy baby."
Family is important to the power couple, who married in 2012 after a five-year, on-again-off-again relationship.
"It's weird because it feels like almost nothing has changed, yet something that you can't really describe, or something that isn't tangible, has changed," the 32-year-old actress told Ellen DeGeneres of married life when she returned from her honeymoon. "It just feels incredible."
— ELLE Magazine (US) (@ELLEmagazine) November 5, 2014
Timberlake echoed his wife's sentiments on his own visit to DeGeneres' show in April 2013.
"It's nice to marry your best friend. It suits me," the 33-year-old singer said at the time. "Every once in a while I can catch a glimpse of her when she doesn't see me looking, and I have this moment where I'm like, 'If you never make a good decision…if you only make bad decisions for the rest of your life. You made one really good decision.'"
Three weeks ago, Timberlake posted a photo of himself and Biel to Instagram for the first time since the two got together —showing the couple sitting on a bench overlooking the ocean in New Zealand, where the pop star was on tour.
Rumors of Biel's pregnancy began last month when photos surfaced of Biel's baby bump, as well as an Instagram photo posted by InStyle editor-in-chief Ariel Foxman, who captioned the image, "Congrats @jessicabiel on your impending motherhood. Looking forward to the red carpet maternity style pix to come #tbt." The image has since been deleted.