Another 'Sisterhood' Reunion!

Hard to say whether this is a good omen for that threequel, but that Sisterhood of the Traveling Pants cast can't seem to get enough of each other. Blake Lively, Amber Tamblyn, and Alexis Bledel recently reunited to support former co-star America Ferrera's Lips Together, Teeth Apart. Sisterhood! I bet some of them were even wearing similar-looking pants!

Tamblyn instagrammed a photo of Lively, Bledel, and herself at the show, excitedly displaying a playbill. Ferrera, adorably enough, regrammed the photo, writing "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."

The sisterhood also reunited in September for some good old fashioned brunch. Tamblyn's instagram, over all, is a treasure trove of sisterhood love — from her one-on-one brunch with Bledel ("Sisterhood of the traveling Pinot.") to her congratulations to Lively over her pregnancy, where she wrote "Finally I can share my little sister's good news! Congratulations my Blakey, you beautiful woman you. What a tremendous mama you are going to be."

Behold:

The September reunion:

One-on-one brunch:

Babies: