KRISTIN CAVALLARI has unveiled the first picture of her baby son Jaxon.

The former 'Hills' star used her new app to share an image of her ''precious little peanut'' Jaxon, two months, along with other family pictures of husband Jay Cutler and their eldest son Camden, 22 months.

She wrote in a blog post called 'Family Time': ''The end of June through the end of July is my favorite time of the year because Jay isn't working and we use those 4 weeks to relax and spend as much time together as possible before he takes off for training camp and the football season begins.''

''This year we took Camden to the zoo for the first time, I cooked up a storm, we had family in and out, and most importantly we adjusted to now being a family of 4 with baby Jax. Speaking of Jax, here is my precious little peanut...''

Among the pictures Kristin, 27, shared was one of Camden greeting a goat at the zoo, herself and Jay enjoying a date night, a homemade pizza, risotto and banana bread, her hitting the gym and working on her new clothing collection.