Three/21 Films will become a division of the independent marketing agency Cornerstone. Under the new arrangement, Three/21 will offer Cornerstone's clients additional creative services and content creation.

Led by Rik Cordero and Nancy Mitchell, Three/21 Films launched in 1999 and has shot feature films, short films and music videos for the likes of Jay-Z, Snoop Dog, The Roots and +/- among many others.