Amber Tamblyn: 'Book Ditto' Book Party!

The Sisterhood of the Traveling Pants stars Alexis Bledel, America Ferrera and Amber Tamblyn reunite to celebrate Amber‘s new book at NYC’s Bowery Poetry Club on Thursday (September 3).

Amber, 26, celebrated the release of her second book of poetry “Bang Ditto” at the Akvinta Vodka-sponsored party. She gave an impromptu reading of her favorite selections from the book accompanied by her mom, Bonnie, on guitar.

Notables in attendance included Amber‘s longtime boyfriend, Arrested Development actor David Cross, 45. TSOTTP costar Blake Lively‘s beau, Penn Badgley, came by to congratulate Amber on Blake‘s behalf as she had to work late. Also spotted: Flight of the Conchords’ Kristen Schaal and Gideon Yago. 10+ pics inside…