Even lawyers have to watch what they say to their wife's friends.

A judge fined the lawyer who slipped J.K. Rowling's secret identity as author of the thriller "The Cuckoo's Calling," according to the Vancouver Sun.

Chris Gossage of the London law firm Russells Solicitors must pay $1,000 pounds ($1,645) for breaching client confidentiality rules. Gossage spilled the beans -- about Rowling writing the thriller as Robert Galbraith -- to his wife's friend, who in turn tweeted the information, which the Sunday Times then reported.

Russells Solicitors apologized and paid damages to Rowling because of the leak.

Damages? Seriously? No one bought "The Cuckoo's Calling" until Rowling's name was associated with it.

J.K. Rowling, author of the Harry Potter book series, poses Monday, Nov. 19, 2001 during a news conference for the National Council for One Parent Families
J.K. Rowling, author of the Harry Potter book series, poses Monday, Nov. 19, 2001 during a news conference for the National Council for One Parent Families in London. (AP Photo/Richard Lewis) ( RICHARD LEWIS )

The Solicitors Regulation Authority also issued Gossage a written rebuke for disclosing his client's confidential information.