He's a tough cookie!' Melissa McCarthy gushes about Sandra Bullock's

Sandra Bullock's son Louis is a 'tough cookie'.
The three-year-old tot became close friends with Melissa McCarthy's daughters Vivian, five and Georgette, three, when Sandra and Melissa worked together on Paul Feig's The Heat and Melissa and Paul insisted protective Louis is not to be missed with.
Melissa told 'Louis was my Georgie's first friend her own age. And all three of our kids, my two kids and her boy, they still play together. They have a special relationship.'

Adorable: Sandra Bullock stepped out to take little Louis to school in Los Angeles on Friday

Paul joked: 'Louis' really protective of her too. He punched out two paparazzi during filming.'
Melissa added: 'Very! Very protective of both girls. 
'He literally does the straight arm and pushes you away and puts his hands up and backs the girls up. You're not going to want to mess with Louis. He's a tough cookie.'
While the kids became close on set, so did their mothers and Melissa is now a huge fan of Sandra after working with her.

Flawless: The actress was dressed down in a black sweater and cropped pants

Their first meeting was over the phone, and as soon as she hung up the comedian thought they might get along. The fact that they did made filming that much more enjoyable.
'We've become quite good friends,' she said.
'I think there's no working that - either you hit it off like that or you don't. And we just happened to. Which made [filming] so ridiculously fun!'

Bonding: Sandra and Melissa take Louis to Disneyland in Anaheim, California in December 2012

Heat follows Sandra, cast as an uptight FBI special agent, who is paired with a 'testy Boston cop', played by Melissa, as they hunt down a drug lord, according to IMDb.
Drama ensues as it's the first time either woman has had a partner.