The Bruno Mars song containing the lyric “I think I wanna marry you” is “Marry You.” The playful line appears in a song built around the impulsive excitement of a spontaneous wedding proposal.
Mars said the song began while he and his collaborators were playing chords and freestyling. Its concept evokes a carefree Las Vegas night: two people are swept up in the moment, feel unusually adventurous, and consider doing something they might regret the next morning. Mars wrote the song with Philip Lawrence and Ari Levine, members of the Smeezingtons.
“Marry You” appears on Mars’s debut studio album, Doo-Wops & Hooligans. It was not initially released as a single in the United States, but it became widely recognized through wedding videos, proposals, and flash-mob performances. That cultural association is why the song is sometimes remembered primarily as a wedding anthem, even though its lyrics deliberately mix romance with impulsiveness and humor.