Don't let me go! Sandra Bullock's son Louis holds his mommy tight as he resists leaving her to attend preschool

Sandra Bullock has made it known that her son Louis has become her first priority, so it's no surprise that the three-year-old was pictured crying on his mother's shoulder before she escorted him into preschool in Studio City on Friday.

Keeping things casual, the 49-year-old wore an oversized v-neck sweater, skinny denim jeans and a messy bun. 

Her other half was quite the debonair gentleman, donning a baby blue vest, long sleeve shirt and relaxed blue jeans.

Mommy's baby: Sandra Bullock began her morning dropping off three-year-old son Louis to preschool in Studio City on Friday

Don't let me go: Louis held onto his mommy tight before she escorted him into preschool

His sadness may stem from Bullock's current busy schedule which includes promoting her upcoming film Gravity, which co-stars actor George Clooney. 

A visual effects-heavy, 3D film, Gravity required Ms Bullock to be suspended from 12 wires to simulate astronauts floating through a weightless environment.

The actress underwent a grueling physical-training regimen for the role. Ms Bullock wanted Dr. Stone, who in the film has undergone a personal tragedy, to look like 'a shell of a woman' - to 'strip almost everything that possibly made her a woman.'

It will be released in theaters on October 4th.

On the go: Bullock was casual and chic as she ran errands in Los Angeles on Friday

Although Sandra is one of the most sought after actresses, surprisingly she lives a very normal and low-key life, residing in Austin, Texas when not filming a new movie.

The Academy Award winner covers the October issue of Vogue Magazine.

Inside, she reveals the deep love for her son and the choice to quit acting for him, saying: 'I don't want him to have pressures brought on by what I do. I will quit. I will leave. If I see whatever I'm doing affecting him negatively, I will pack up and move to Alaska.'

Already a mother of one, Bullock has an open mind when it comes to expanding her family.

'If all of a sudden someone said, "You have five more kids," I'd be totally OK with it. I'm having such an amazing time. Whatever comes our way, we handle as a family. It's not just me anymore.'

Vogue cover girl: Sandra Bullock graces the October issue of Vogue Magazine. Inside, she talks about quitting Hollywood and expanding her family