The title track of Lover was first unveiled in Swift’s September 2019 Vogue cover story, along with a pair of lyrics from its bridge. The interviewer described the song as a “romantic, haunting, waltzy, singer-songwritery nugget.” Swift announced the song’s release date during an acceptance speech at the 2019 Teen Choice Awards. Three days later, the song appeared on iTunes, revealing that it’s the third track on the album.

The song is a romantic track dedicated to Swift’s partner of three years, Joe Alwyn. It takes a wedding-like perspective on their relationship and shares information about their romance. A Twitter user who attended one of the secret sessions alleged that “‘Lover’ is Taylor’s favorite [original] song of all time,” having asked her directly during a Q&A.

On the day of its release, “Lover” reached number #1 on the US iTunes charts, making it her 35th song to do so. With this milestone, she extends her record as the female with the most #1 singles in iTunes' history.

The music video for the song was released on August 22, 2019, immediately following Swift’s Lover’s Lounge on YouTube. It features Swift and her love interest in a house inside a snow globe, illustrating the ups and downs of a relationship in progress. During Swift’s livestream, she further revealed that the concept for the music video originated from a lyric in her 1989 song, “You Are In Love”:

And so it goes
You two are dancing in a snow globe, ‘round and 'round