"This Will Be the Day" is the opening theme to Volume 1 of RWBY. It is also used as the outro song for "Ruby Rose", and is incorporated into the RWBY: Volume 1 Soundtrack. Two new versions of the song are also included on the RWBY: Volume 2 Soundtrack: an acoustic version arranged for strings and piano, and an electronic dance remix by James Landino entitled the "Magical Girl Remix".