Amanda Seyfried Pushes for Sabrina Carpenter and Sydney Sweeney in 'Mamma Mia 3' as Production Nears
Amanda Seyfried advocates for Sabrina Carpenter and Sydney Sweeney to join 'Mamma Mia 3' as new additions to the cast, with producer Judy Craymer confirming the film is well into development following Meryl Streep's passing.
