New Delhi, June 30 (ANI): Keira Knightley has revealed that she feels it's a miracle that her musician husband, James Righton, is still married to her after he tried giving her guitar lessons. She said that she was so bad at learning how to play the instrument that she is surprised that Righton didn't kill her, a web portal reported. The 'Begin Again' star, who plays guitar in an upcoming comedy-drama, said that her husband is a musician and he tried to teach her guitar but the session didn't go well. Knightley added that it was fine, since, none of them tried to kill each other.