Arie Luyendyk Jr. and Lauren Burnham have mastered post-Bachelor bliss amid the arrival of their fourth baby. The couple announced the little one's arrival via Instagram on Monday, September 22. "Welcome to the world livvy rowe luyendyk.9/18/25," the pair wrote. "Love you our sweet little angel girl!" The post included several snaps of the proud parents holding the newborn, who was wrapped in a fuzzy blanket and wearing a pink headband. Arie and Lauren met during season 22 of The Bachelor, which aired in 2018.