Opting for a laid-back style for her childfree outing, the 36-year-old wore blue-wash frayed shorts, a patterned linen shirt Dad sandals, finished with a pair of tortoiseshell sunglasses and a burgundy shoulder bag.
Blake appeared to go makeup-free, wearing her hair in a loose plait that fell over one shoulder.
The Gossip Girl actress walked through the busy New York streets hand in hand with her husband Ryan, 46, who wore a pink collared shirt with the sleeves rolled up and a white vest peaking through, with a pair of cream trousers and white sneakers.
The Hollywood couple married in 2012 and share four daughters together, James, eight, Inez, six, Betty, three, and an eight-month-old baby.
While they tend to keep their family life private, Ryan shared a glimpse into the pair's relationship last month with a sweet tribute to Blake on her birthday.
The Deadpool actor posted a carousel of photos of himself and his wife, including a gorgeous snapshot of Blake smiling on the beach in a sheer lace dress.
Ryan captioned the post: "The only thing irrevocably mine in the world is the love and appreciation and awe I feel for this person. Witnessing her life is something I couldn't take for granted if I tried. And believe me, I try. Happy Birthday, @blakelively. You hung the damn moon."
Fans and friends rushed to the comments section to wish the mother-of-four their well wishes. Chelsea Handler wrote: "You guys are pretty ducking cute." While David Beckham added: "Happy Birthday @blakelively."
"This is single-handedly the best caption I've ever read in my life," another follower gushed.