Asked if her co-star really had been a ‘curmudgeon’ on set during the Sound of Music 50th Anniversary in 2015, Andrews replied: “‘Afraid so. But a delicious one. But I’m used to that because Blake was one also.”

Andrews is referring to her late husband, director Blake Edwards.

She also says that she embraces Plummer being a curmudgeon because he is, “a very dear one and a very good friend.”

Plummer, in response, pays tribute to the inspiring way Andrews’ lead the cast on set: “We followed her like Saint Joan into battle. You would have agreed with me had you been there.”

He then turned to his co-star and said: “It was your film and you drove it.” 

Plummer had spoken before about his understandable nerves performing his singing scenes alongside a Broadway leading lady, but also confessed he drank rather a lot throughout the film shoot for other personal reasons, too.

SCROLL DOWN TO WATCH CHRISTOPHER PLUMMER AND JULIE ANDREWS BEING INTERVIEWED TOGETHER