What a surprise!

Julie Andrews made an unexpected appearance during tonight's Oscars to pay special tribute to The Sound of Music.

julie andrews

Lady Gaga and Julie Andrews at the Oscars.

Following a stunning performance of songs from the 1965 film by Lady Gaga, Julie — who, of course, portrayed free-spirited governess Maria in the classic movie — arrived onstage to a standing ovation.

Related Story: Patricia Arquette Wins Best Supporting Actress Oscar for 'Boyhood'

"It's hard to believe that 50 years have gone by since that joyous film was released. I blinked and suddenly here I am!" Julie, 79, began.

julie andrews 'the sound of music'

Julie Andrews in 'The Sound of Music.'

"I think that I do speak for everyone connected to the movie when I say, we all really felt blessed to be a part of it. And as for me, well, how lucky can a girl get?" she said.

Watch Lady Gaga's musical tribute to 'The Sound of Music' below.

(Video Credit: ‘The Hollywood Reporter’)