"To get them to sing the song and put one foot in front of another ... it was like rocket science," jokes Christine Baranski of her Mamma Mia 2 costars Jen Juneau is a News and Movies Staff Writer ...

Nigel Smith is the Senior Movies News Editor for PEOPLE. He is an experienced culture editor and writer with a 12-year history of working in the online and print industries. Amanda Seyfried‘s ...