November 26, 2014 - 15:42 GMT hellomagazine.com Emily Blunt has revealed that she saved Meryl Streep's life on the set of the upcoming Into The Woods after Meryl tripped on her cape whilst filming Emily Blunt has revealed that she saved Meryl Streep's life on the set of the upcoming Into The Woods. Disney's adaptation of the Tony award-winning musical, the film explores the consequences of wishes made by fairytale characters, and Meryl, who stars as The Witch, tripped on her long cape whilst filming.SCROLL DOWN FOR VIDEO "We were rehearsing a scene where she plays a witch and she was supposed to jump on the table with her cape and everything, and I saw it happening in slow motion... Meryl Streep and Emily Blunt in Into The Woods "Meryl Streep's foot got caught in her cape, and we just started to watch her slowly topple headfirst toward the concrete floor", Emily told David Letterman during the TV personality's late night talk show. Emily, who was pregnant with her first child during filming, added: "Rob Marshall [the director] and James Corden froze, and the pregnant women caught her."I actually caught her, so she owes me, big time." Earlier in the interview, Emily had discussed starring alongside Meryl in Into The Woods, and The Devil Wears Prada, and joked: "She's so amazing, it's annoying. She was tormenting me in that, and now she's tormenting me in this movie. Emily Blunt with Meryl Streep and Anne Hathaway in The Devil Wears Prada "I said, 'This is it, we can't have any other dynamic now, you have to hate me.'"Into The Woods begins with the Baker and the Baker's wife, plated by James and Emily, and their interaction with the evil old witch, Meryl, who has placed a curse of the couple, leaving them childless. Soon Cinderella (Anna Kendrick), Little Red Riding Hood (Lilla Crawford), Jack and the Beanstalk (Daniel Huttlestone), and Rapunzel (MacKenzie Mauzy) all become bound together with the couple, as they attempt to break the witch's spell. Also starring Johnny Depp as the Big Bad Wolf and Chris Pine as Prince Charming, Into The Woods is out in the UK on January 9 2015.