The 34-year-old celebrity blogger has nicknamed his bundle of joy, Sweet Pea or sometimes calls him Perez Jr.
In a series of intimate shots, the new dad is seen playing with his boy on his changing mat, on the bed, in the bath and with his mom and the family dog.
And of course, Mario is decked out in some fun stylish outfits!
Perez welcomed his son back in February with the help of an anonymous egg donor and was carried by a surrogate.
Leave Perez some congratulatory messages below or tweet them to @OKMagazine!