Why Keira Knightly Ultimately Decided 'Not to Kill' Her Husband

The actress is not a very patient student.

ByABC News
April 29, 2014, 12:59 PM
James Righton, left, and Keira Knightley, right, are pictured on March 4, 2014 in Paris, France.
James Righton, left, and Keira Knightley, right, are pictured on March 4, 2014 in Paris, France.
Michel Dufour/Getty Images

April 29, 2014 — -- Keira Knightly sings in her latest movie "Begin Again" opposite rocker Adam Levine.

So, one would assume having a husband like James Righton, who is a musician, would come in handy for the role.

You would assume wrong!

"He tried to teach me how to play the guitar and I tried not to kill him, so that was about it," Knightly, 29, told E! News at the film's premiere on Saturday. "And he stopped trying to teach me the guitar ‘cause I'm not very good at it."

Read: Keira Knightley Sings, Adam Levine Acts in New Film

Knightly is coming up on her first wedding anniversary on May 4.

"We're still together, so it must have been alright," she said about her first full year of marriage.