Amber Tamblyn, David Cross" Star-Studded Wedding Questtlove/Instagram Amber Tamblyn and comedian David Cross were married this weekend at a star-studded celebrity wedding attended by the actress" "The Sisterhood of the Traveling Pants" co-stars and a host of other hip Hollywood talent, and now, photos of Tamblyn's unconventional yellow wedding dress are making the rounds online. The nuptials were attended by the 29-year-old Tamblyn's "Pants" co-stars Blake Lively, America Ferrera and Alexis Bledel, along with Lively's new husband Ryan Reynolds. Comics Amy Poehler and Will Arnett, who recently separated after nine years of marriage, and "30 Rock""s Kristen Schaal were also there, according to E! It is unclear where the wedding took place. The Roots" drummer Questlove, another A-list wedding guest, tweeted Instagram photos of the event, writing, "Princess Amber arrives in style" with an image of the actress stepping out of a boat barefoot with her father, actor and dancer Russ Tamblyn. New Jersey indie rock legends Yo La Tengo, who are also friends with Cross, provided music for the event, according to E! This is the first marriage for Tamblyn and the 48-year-old comic.