"Counting toes," Farley, 28, captioned the darling picture, featuring 2-year-old Lorenzo holding the tiny feet of Meilani, 7 weeks.
JWoww's BFF Snooki couldn't help but share more photos of the super cute twosome as well.
"OMG how adorable are these two together?!," Polizzi, 26, wrote on her website. "Lorenzo’s already protecting Meilani and I’m obsessed. They’re so going to be besties!!"
Looking over little Meilani is perfect practice for future big brother Lorenzo, with Polizzi expecting a baby girl with fiance Jionni LaValle.
Polizzi also revealed that the cute playdate happened while they were shooting the upcoming fourth season of Snooki & JWoww, which Farley told Us would get candid.
"You will kind of get to see the delivery," she said about including her baby girl on the MTV hit spin-off. "No one needs to see my vagina but you’ll see."