Kate Mara is in talks to join Danny Boyle's survival drama 127 Hours, starring opposite James Franco and Amber Tamblyn.

According to The Hollywood Reporter, she also has booked more time as Eric's assistant Brittany in upcoming episodes of HBO's Entourage.

Fox Searchlight's 127 Hours tells the true story of Aron Ralston, a mountain climber trapped under a boulder in Utah who who was forced to amputate his own arm after it was pinned under a boulder for over five days. Mara and Tamblyn play hikers he meets before his ordeal.

No production date was announced.