Twitter's Board of Directors is no longer 100 percent men, after the company announced the appointment of former publishing CEO Marjorie Scardino to its ranks. The announcement, of course, was published to Twitter: 
 

According to the company's SEC filing, Scardino's appointment is effective immediately and she will remain on the board at least through 2014.

In 1997, Dame Marjorie — she's American by birth, but is now a British citizen — became the first woman at the top of a FTSE 100 company as CEO of Pearson,  a position she left in October of last year. 

Following widespread criticism for the company's near-complete lack of women in upper leadership roles,  the company started a search for a female addition to its board earlier this year. As expected, that appointment followed Twitter's IPO in November. AllThingsD reported at the time that the company's dream board candidate was Hillary Clinton and that the new board appointment would focus on a candidate with international, rather than tech, expertise. 

She also doesn't seem to have a lot of Twitter expertise. As of the announcement, Scardino's Twitter account had just one tweet:  an acknowledgement of her appointment to the board. The newest Twitter board member's extensive background is in international media and publishing, rather than in tech ,which itself is a nod to the company's expanding ambition as media powerhouse.