The track features vocals by American rapper Lil Wayne, who wrote his guest verse, while the original composition was written by members of collective The Clutch including Balewa Muhammad, Candice Nelson, Ezekiel Lewis, along with Marcella Araica and Nathaniel "Danja" Hills.
Production of the song was handled by Nathaniel Hills.
The song was first released for digital download in the United States on August 5, 2008, through Bad Boy and NextSelection in association with Atlantic Records.
"Official Girl" is an R&B song, with the beat being referred to as "candy-floss production."
Cassie stated the track stood out to her for its relatability with a good message and for being musically different.