Hilary Duff is certainly in the holiday spirit - and very pregnant!

Thursday, the singer-actress uploaded a picture to her Twitter account, unveiling a bare baby bump and a painted, gift-wrapped present with the phrase "Happy Holidays."

The artiste who created this festive image? Sister Haylie Duff!

"What would I do without you and your artistic ways?" Hilary Duff, 24, tweeted.

Haylie, 26, replied: "I can't wait to meet my nephew. Hurry up and get here!"

Oh, soon enough girls. Soon enough.

This will be the first child for Hilary and husband Mike Comrie, 31.

Congratulations and happy holidays!