Katy Perry expressed her desire to write the theme song for Hillary Clinton's presidential campaign.

The former Secretary of State, who's currently on a media tour to promote her book 'Hard Choices', took to Twitter to respond to the 29-year-old pop star's offer, writing that she kind of already did with her song 'Roar', the Hollywood Reporter reported.

The 66-year-old former Secretary of State asked Perry to keep up her good work.

But Perry may have to wait a while for her wish as Clinton hasn't announced her decision for the Presidential candidature yet.