Blunt, in an interview with Howard Stern on his Sirius XM radio show about her new movie Sicario, said she had the issue as a child but it has come back to haunt her in her adult life.
“When I’m on the phone, it comes back, because I think it’s that pressure to communicate only with your voice,” Blunt said.
“Anytime I feel under pressure, and actually when I was pregnant it came back really badly. My diaphragm was so constricted. There wasn’t any space in there. I think I need to be really relaxed and calm to speak freely.”
Blunt said acting had helped her get past the impediment. As a child a teacher encouraged Blunt to try out for her school’s play so she could gain confidence in her speaking voice.
Blunt is one of a number of famous actors who had stutters as children, including Bruce Willis and Ed Sheeran.