Sienna Miller could replace Kate Moss as the face of Burberry. After the catwalk queen was dropped after her cocaine habits were exposed, bosses at the prestigious fashion house are considering hiring the beautiful actress to front their new advertising campaignA source revealed: "Sienna Miller is one name being discussed" Meanwhile, Burberry bosses are reportedly holding crisis talks with top photographer Mario Testino after his friend Kate was axedThe celebrity snapper was due to photograph the shamed supermodel for the label's Spring 2006 campaign next monthBut insiders claim the company fear he may quit over Kate's dismissalA source explained to Britain's Telegraph newspaper: "The last thing Burberry needs is him storming off in a huff, so they've scheduled crisis talks with Testino to make sure he agrees with their new choice of model" Burberry's designer director, Christopher Bailey, confirmed: "Yes, Mario and I are going to meet next week to discuss the campaign But I'm afraid I can't tell you any more"