(SoapOperaNetwork.com) — “General Hospital’s” Amber Tamblyn (ex-Emily Quartermaine) has signed on to star along-side James Franco (Franco) in the upcoming film “127 Hours” by “Slumdog Millionaire” Academy Award winning director Danny Boyle. The film is about Aron Ralston (Franco), a mountain climber who is forced to cut off his arm with a dull knife in order to save his life after being unable to free the lim from under a boulder. According to Deadline.com’s Nikki Finke, Tamblyn will portray his girlfriend, whose relationship with Aron will be played out in flashbacks which helps him keep going. Production on the film is scheduled to begin in March in the state of Utah. The film will be distributed by FOX Searchlight Pictures, a division of News Corporation. In addition to directing, Boyle also co-wrote the screenplay along-side “Slumdog” writing partner Simon Beaufoy. Since leaving “General Hospital” in 2001, Tamblyn has had starring…