'Big Love' rules Seyfried out of 'Punch'

Amanda Seyfried has been forced to drop out of starring in Sucker Punch due to her Big Love TV contract.

According to Entertainment Weekly, HBO has refused to release Seyfried from her Big Love agreement to lead the cast of the Zack Snyder action-fantasy. Filming on the new series of the polygamy drama will overlap with Sucker Punch.

Vanessa Hudgens, Abbie Cornish, Evan Rachel Wood and Emma Stone have been tapped to star in the movie, which centres on a young woman called Baby Doll who slips into a fantasy reality to escape the confines of an all-girl insane asylum.

Snyder has yet to cast a replacement for Seyfried.