Clearly, the cast of Mary Poppins Returns had so much fun making the musical they couldn’t keep it together during takes.

In a new look at their behind the scenes antics, Emily Blunt, Lin-Manuel Miranda, and Meryl Streep struggled to remain composed. Admittedly, Emily was the first to get out of character as the magical nanny. But then things take a wide turn! 

Watch and see for yourselves. (via People)