According to J.Crew's press release (click here or here):
Suze Yalof Schwartz, Executive Fashion Editor-at-Large of Glamour magazine, introduced Roberts to J.Crew's Creative Director, Jenna Lyons. Yalof Schwartz and Roberts met with Jenna and the J.Crew design team at their New York Headquarters to view J.Crew's designs for the perfect Red Carpet look. The taped visit aired on Good Morning America on Wednesday, February 18th. Roberts encouraged America to weigh in to help her choose her Oscar gown. Ultimately, J.Crew was the favorite over two other high profile designers. As of today, over ten thousand GMA viewers had written in sharing their opinions.
Part of J.Crew's Weddings & Parties Collection, Roberts chose the "Gracie" gown in Fresh Tangerine. This special color is part of the fall 2009 Collection and made exclusively for Robin and this Red Carpet occasion. She looked beyond the Red Carpet regulars and chose J.Crew - an unexpected designer for the Oscars, re-confirming that high fashion does not have to cost a fortune. The "Gracie" gown is about sophistication and glamour, carried through in a sleek shoulder-baring gown. The J.Crew designers used dreamy triple-ply silk tricotine and designed a dramatic halter silhouette, offset by a deep-V down the back and a straight skirt that elegantly floats to the floor. Cut slightly longer in back, there are beautiful designer details throughout. Robin also wears J.Crew shoes and accessories including the Organdy Fleur Peep Toe Heels and the Satin Minaudiere Clutch.
Very exciting news for J.Crew! Also, I think Robin looks great in the J.Crew dress. (Although my pick for her was the "Reem Acra's Cobalt Blue Goddess Dress".) :)