《音乐之声》音乐剧的主题曲是《The Sound of Music》。这首歌由理查德·罗杰斯作曲，奥斯卡·汉默斯坦二世填词，朱莉·安德鲁斯在电影中演唱。以下是这首歌的部分歌词：

The hills are alive
With the sound of music,
With songs they have sung
For a thousand years.
The hills fill my heart
With the sound of music,
My heart wants to sing
Every song it hears.
My heart wants to beat
Like the wings
Of the birds that rise
From the lake to the trees,
My heart wants to sigh
Like a chime that flies
From a church on a breeze,
To laugh like a brook
When it trips and falls
Over stones on its way
To sing through the night
Like a lark who is learning to pray—
I go to the hills
When my heart is lonely,
I know I will hear
What I've heard before.
My heart will be blessed
With the sound of music
And I'll sing once more.

《音乐之声》不仅是一首优美的歌曲，也成为了音乐剧的经典之作。