"Today on International Women's Day, I'm giving a shout out to the women I have been through hell and back with. The women I don't get to see enough, but when I do, we pick right back up where we left off," Amber wrote on Instagram in honor of International Women's Day in 2019.
"Not just my friends, but my sisters, my mentors, my inspiration—Artists, poets, activists, women. We can and do empower each other. When women support each other, we accomplish amazing things. Celebrate the women who #LeanInTogether with you," Lively captioned a group plane shot in 2016.
It's become tradition for the Sisterhood of the Traveling Pants co-stars Amber and America to ring in the New Year together.
"Starting the New Year off with blessings from my Sisterhood. We've got work to do for the next generation. Let's get to it. #TIMESUP," Ferrera captioned a sweet photo with her gal pals to kick off 2018.
When these four get together it usually includes girl talks, funny faces, pictures and lots of hugs and we're all for it.
No matter what the project, Bledel, Lively, Ferrera and Tamblyn are there to support each other. They attend each other's movie premieres, root for them on stage and show up to watch their plays.
"Look who dropped by my matinee today and made my day! #MySisterhood ! Love these women and the support they constantly show. @amberrosetamblyn , Blake & Alexis. #lipstogetherteethapart @2stnyc," Ferrera wrote.
Whether it's the Times Up movement or walking in the Women's March in matching hats, these girls have each other's backs.
Their sisterhood is being passed down to the next generation through baby moments, being aunts to one another's children and gushing over each other's pregnancies along the way.
"Hipsterhood of the Traveling Pants," Tamblyn captioned one photo. "Sisterhood of the traveling Pinot," she captioned another.
Whether they're fighting (pretend) on the set of a magazine shoot, or drawing the missing sister into a throwback photo, the sisterhood is clearly here to stay.
The besties that brunch together, stay together.