Sarah Michelle Gellar’smanager JoAnne Colonna has left The Firm to join the senior ranks ofBrillstein-Grey Management.

Colonna, whose other clientsinclude Andy Garcia, Brittany Murphy, Brendan Fraser and Anna Paquin, servedsix years at Artists Management Group (AMG) and The Firm, which eventuallyacquired it, as co-head of the talent department.

It is understood she willcontinue to focus on the representation of actors, directors and literarytalent, and develop her film and television producing role.

Colonna started as an agentat Paradigm and moved to ICM. She co-founded the talent department at AMG in1998. AMG was acquired by The Film in 2002.

She is currently serving asexecutive producer on Universal’s Alice, starring Sarah Michelle Gellar and based on thevideo game.

Colonna is expected to beginher job at Brillstein-Grey on Aug 1.