Brad Paisley humorously celebrated his wife Kimberly Williams-Paisley‘s 54th birthday on Sunday (September 14) by announcing the newest addition to their family, a newborn donkey on their farm. The country superstar shared a photo of Kimberly with the infant animal on Instagram, and joked about the unusual combination of the two announcements. “A beautiful donkey was just born on our farm,” Paisley captioned his post. “Speaking of, it’s the beautiful @kimberlywilliamspaisley’s birthday today! Happy birthday! As I write this I realize what a bad idea it may have been to combine the two announcements. I’m not saying they are in any way similar.” Kimberly playfully commented on the post, “A hundred bucks says if that donkey wasn’t born on our farm, he’d have forgotten it was my birthday.” The couple, who began dating after Kimberly starred in one of Brad’s music videos in 2001, married in 2003 and have two sons, William and Jasper. (People)