Bachelor couple Arie Luyendyk Jr. and Lauren Luyendyk are celebrating the birth of their fourth child. ADVERTISEMENTArie, 44, and Lauren, 33, announced Monday that they welcomed daughter Livvy Rowe on Sept. 18. "welcome to the world livvy rowe luyendyk. Arie and Lauren met in The Bachelor Season 22, which ended with Luyendyk getting engaged to Becca Kufrin then calling it off to propose to Lauren, the runner-up. Arie and Lauren announced in March that they were expecting their fourth child.