Willie Brown was in Godfather III, in one scene.
Also, 9/11 related, (((never forget))) he got a phone call from Condoleezza Rice warning him not to book any plane flights that week.
The first coincidence can be explained away as simply as Willie Brown was politically active during the time that American Zoetrope had offices in the Bay Area right near the Transamerica building.
The second, well, that's for history to decide.