My Best Friend's Girl may refer to:
"My Best Friend's Girl" (song), a song by the Cars from the album The Cars (1978) "My Best Friend's Girl", a song by Steps from the album Steptacular (1999) My Best Friend's Girl (2008 film), a romantic comedy starring Dane Cook and Kate Hudson My Best Friend's Girl (1983 film), a film directed by Bertrand Blier My Best Friend's Girl (novel), a book by Dorothy Koomson
See also My Best Friend's Girlfriend, a 2008 Filipino romantic comedy film "The Girl of My Best Friend", a song