Details...

• Character: Queen Elizabeth
• Actor: Imelda Staunton
• Show: The Crown
• Episode: 6x10 - “Sleep, Dearie Sleep”
• Brand Product : Custom @ Costume Department
• Buy:

  “Delivering a speech at the Women’s Institute, she wears a silk crepe dress, coat, and hat in a vibrant lime green that draws focus and “highlights her confidence in this arena,” according to costume designer Amy Roberts and associate designer Sidonie Roberts.”

  (Source)