She got her start songwriting for country music greats -- then she became one.

Prince William and Princess Kate Middleton marked firstborn son Prince George's 12th birthday by sharing a new portrait of the soon-to-be teenager. In the pic, a smiling George can be seen leaning against a fence in the countryside.

“Happy 12th Birthday to Prince George! 🎂” read the caption. In the photo, George beams at the camera, and looks like the spitting image of his father, William. William and Kate also shared adorable video footage of George and his siblings, Princess Charlotte and Prince Louis, in another post from the same photo shoot.