Jennifer Garner is preparing to mark a new milestone following her ex-husband, Ben Affleck's wedding to Jennifer Lopez in July 2022.The Yes Day actress will celebrate her first birthday since Ben and Jennifer cemented their reunion with two weddings last year. Jennifer will turn 51 on April 17, and will no doubt mark the occasion with her children, Violet, 17, Seraphina, 14, and Samuel, 11, and her boyfriend, John Miller.WATCH: How 'Bennifer' rekindled their romance after Jennifer Garner divorceDespite Jennifer and Ben divorcing in 2015, the former couple has remained on good terms, and successfully co-parent their children.