But the singer posted a photo on Instagram that made it clear no one needs to bother picking out a present for him... because his wife has already gotten him all he could ever ask for.
"Thank you EVERYONE for the Bday wishes! This year, I'm getting the GREATEST GIFT EVER. CAN'T WAIT," Timberlake wrote as a caption to the following snapshot.
This photo marks the first time either half of this famous couple has confirmed the news, however.
"#BoyOrGirl #YouNeverKnow," Timberlake added on his Instagram account. "#WeDontEvenKnow #WeAreTakingBets."
Either way, is there any doubt this child will be both gorgeous and very talented? He or she is reportedly due to arrive in April.
We've asked in the past whether readers can see Biel's baby bump, but it's pretty hard to miss in the image above, isn't it?
We send our best wishes to Justin and Jessica and also to all the other well-known couples expecting a baby in 2015:
