The newborn arrived at 2:30 a.m. on Thursday, May 30, weighing 7 lbs., 8 oz.
“So thrilled to welcome baby Angelo into our little family! He is so sweet and a spitting image of Lorenzo as a baby,” Polizzi, 31, told PEOPLE.
“Jionni and I can’t wait to see how being outnumbered turns out!”
Baby Angelo joins sister Giovanna Marie, 4½, and brother Lorenzo Dominic, 6½.
After announcing in November that she and LaValle were expecting a sibling for Giovanna and Lorenzo, Polizzi revealed the following month that the baby would be a boy.
The reality star then surprised fans in mid-April by sharing the name of her son on Instagram.