Possible Clues:

• She plays Julia in "Julie & Julia"
• She played Donna in the film "Mamma Mia!"
• 'Mamma Mia!' actress Streep
• Clint's ''. . . Madison County'' costar
• She played Sophie
• Oscar-winner as Sophie
• "Silkwood" star Streep
• Instrument returned to married woman
• Pixar's tale of playthings
• Substitute Merest reply (anag) - actor