Bradley Cooper has been tapped to co-star with Sandra Bullock in Fox 2000 comedy “All About Steve” directed by Phil Traill. Bullock is producing via her Fortis Films. Mary McLaglen exec produces along with Underground Films’ Nicholas Osborne and Trevor Engelson. Shooting begins in Los Angeles later this summer. Kim Barker’s script follows an eccentric, brilliant crossword puzzle fanatic who stalks Cooper, a TV news cameraman, across the country after their first date. Thomas Haden Church is in negotiations to portray a news correspondent.