Meryl Streep prepared for her singing scenes in new movie musical Into The Woods by standing on her head.

The actress, who previously showed off her singing skills in Mamma Mia!, admits she used tried and tested methods to sound her best throughout filming.

Streep, who plays The Witch in the upcoming star-studded movie, explains, "I really worked very hard to bring my voice back because I used to have a good voice. I tried to do my exercises that I remembered from Yale (university) and all the things from the olden days of clearing your sinuses.

"If you stand upside down it really is good; it gets everything flowing."