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  • Julie Andrews
    Cast member Julie Andrews poses during the 50th anniversary screening of musical drama film "The Sound of Music" at the opening night gala of the 2015 TCM Classic Film Festival in Los Angeles, CaliforniaReuters
  • Julie Andrews
    Cast members Christopher Plummer (L) and Julie Andrews pose during the 50th anniversary screening of musical drama film "The Sound of Music" at the opening night gala of the 2015 TCM Classic Film Festival in Los Angeles, CaliforniaReuters
  • Julie Andrews
    Cast members Christopher Plummer (L) and Julie Andrews are interviewed during the 50th anniversary screening of musical drama film "The Sound of Music" at the opening night gala of the 2015 TCM Classic Film Festival in Los Angeles, CaliforniaReuters
  • Julie Andrews
    Julie Andrews hugs Lady Gaga after she performed songs from the Sound of Music at the 87th Academy Awards in Hollywood, CaliforniaReuters

The 1965 American classic "The Sound of Music" completed its 50th year this month, though the lead star Julie Andrews said it felt like a "big joke" that the film is celebrating its 50th anniversary.

The Academy award winning film that starred Julie Andrews as Maria, Christopher Plummer as Captain von Trapp, a retired Austrian naval officer ended up as the highest grossing film of 1965. So, as a tribute to the musical classic, the TCL Chinese Theatre in Hollywood arranged for a screening.

Andrews attended the event with her co-star Christopher Plummer; both of them remembered their old days as though time had stood still. "It feels like 75 actually," joked Plummer when asked if it seemed like half a century had passed. And Andrews couldn't quite believe it: "No I think it's a big joke. I think it feels like about 30."

Based on the book "The Story of the Trapp Family Singers" by Maria von Trapp, the film is about a young woman who becomes a governess to the seven children of a naval officer widower and ultimately falls in love with him. They marry and plan on settling when the World War II starts. After facing many difficulties, the family successfully escapes the Nazis over the Swiss Alps to freedom.

The film festival will also feature the restored 4K version of the film that will be screened at over 500 movie theatres in April. The 50-year milestone was also honoured by 20th Century Fox with the release of a five-disc Blue-ray/DVD collection and the soundtrack was also re-released.

Earlier this year, pop-singer Lady Gaga performed a medley of songs from the classic as a tribute to the movie completing 50 years. Andrews came on stage to thank Gaga. "It really warmed my heart, it really did," she said, after her performance.