Blunt was previously reported to be in talks to play The Baker's Wife in the Rob Marshall ("Chicago," Cabaret) screen adaptation of Stephen Sondheim and James Lapine's Tony Award-winning musical.

"I'm not the greatest singer in the room by any means, but I'll have fun trying," Blunt told New York Magazine. "I can't believe I'm playing in two movies with Meryl where she's playing someone who's horrible to me. I'm so excited."

Casting for the film has not been officially announced; however, Marshall confirmed to Playbill.com's Seth Rudetksy that Academy Award winner Streep will star as the Witch in the film adaptation. 

Marc Platt, Marshall, John DeLuca and Disney produce the film that is expected to begin filming in London this September.

As previously reported, singer-songwriter Jewel may be looking to add the role of Cinderella to her crown. It has also been reported that "Sweeney Todd" star Johnny Depp has closed a deal to portray the Wolf with Tony Award winner James Corden (One Man, Two Guvnors) likely to portray the Baker. Jake Gyllenhaal, who starred in the Off-Broadway drama If There Is I Haven't Found It Yet, and Chris Pine, seen on the New York stage in The Atheist, are in talks to play the Princes; while Tony Award winner Christine Baranski (Hurlyburly, The Real Thing, "Mamma Mia!") is also in negotiations for the film – she was part of a reading of the screenplay adaptation of Into the Woods last fall, where she played Cinderella's Stepmother. 

Read the Playbill Poll that asked readers to pick who they would like to see star as the Princes in the upcoming film. 

Tony and Pulitzer Prize-winning Into the Woods book writer Lapine authored the screenplay based on his own book for the 1988 musical. During an October reading of the screenplay, Lapine had streamlined the musical into a two-hour treatment for the screen.

Composer-arranger David Krane (Road to Qatar), who penned the arrangements for Marshall's film adaptations of Chicago and Nine, is working on arrangements for the Into the Woods film adaptation. DeLuca also produced Marshall's screen adaptations of "Nine" and "Chicago."

Into the Woods features a Tony-winning score by Sondheim and Tony-winning book by Lapine, who also staged both Broadway productions of the musical. Into the Woods premiered on Broadway in 1987 at the Martin Beck Theatre starring Bernadette Peters, Chip Zien, Joanna Gleason, Kim Crosby and Robert Westenberg. The original cast performance was preserved by PBS' American Playhouse in 1991. A 2002 Broadway revival played the Broadhurst Theatre.