Krall and Costello expecting a baby

Canadian singer Diana Krall and husband Elvis Costello are expecting a baby.

A spokesman for the pair has confirmed The Look of Love singer is due in December.

The baby will arrive just in time for the couple's third wedding anniversary on December 6.

Veteran English singer Costello, 51, is touring with Allen Toussaint in support of their album, The River in Reverse.

Krall, 41, is set to release her new album this September.