《爱情神话》插曲是《The Soldier's Sweetheart》。
2022年1月17日电影《爱情神话》官宣延期电影密钥，延长上映至1月31日，将“神话”继续，将烟火留存。影片上线插曲《The Soldier's Sweetheart》，轻柔慢调的音乐中，让人再次回味“爱情神话”的魅力与暖意。
《The Soldier's Sweetheart》舒缓轻柔的音乐衬托着老乌（周野芒 饰）娓娓道来的爱情故事，为这段“神话”装点了一份温暖与美好。
《爱情神话》插曲歌词
Once I had a sweetheart
A sweetheart brave and true
His hair was dark and straight
His loving eyes were black
He told me that he loved me
And he often proved it so
And he often came to see me
When the evening sun was low
But fate took him away
To this awful German war
And when he came to say goodbye
My heart did overflow
He says goodbye little darling
To France I must go
He takes the golden finger ring
And he placed it on my hand
Said remember me little darling
When I'm in no man's land
He promised he would write to me
That promise he kept was true
And when I read this letter friend
I pray the war is through
The second letter I got from him
The war was just ahead
The third one wrote by his captain
My darling dear was dead
I'll keep all of his letters
I'll keep his gold ring too
And I'll always live a single life
For the soldier who was so true