Talk about killing us with cuteness!
The snap marks the first time the 41-year-old star has publicly shared a shot of the bundle of joy's sweet face since she and husband Ol Parker welcomed him back in March.
At the time of the little guy's arrival, Newton tweeted the happy news, writing, "Our baby boy is finally here! Booker Jombe Parker. Born joyously at home yesterday."
Our only previous glimpse at Booker was when Newton posted a pic of just his hand resting on Mommy's chest four days after he was born.
Earlier this month (and just weeks after giving birth!), the actress showed off her fabulous post-baby body at the London premiere of her movie, Half of a Yellow Sun.
Dressed in a black, formfitting dress, she looked effortlessly svelte.
In addition to Booker, Newton and Parker have two daughters: Ripley, 13, and Nico, 9.