Charmian Carr, who played Liesl, the eldest of the Von Trapp children in The Sound of Music, has tragically passed away at the age of 73.

She died after complications from a rare form of dementia, her representatives have said.

On her official website, a statement from the site’s manager Steve Hughes reads: "Me and my family are so sad to have to post this message and will miss her dearly.

“We had the gracious opportunity to stay at Charmian Carr’s house several times while we worked on different projects for her. And we travelled to New York with her on another occasion.

“She was such a nice, cheerful person. We always loved The Sound Of Music and still do."

Sound of Music Liesl star Charmian Carr dies aged 73