Former News International chief executive Rebekah Brooks, 44, from Churchill, Oxfordshire, also appeared at the Old Bailey charged with conspiracy to commit misconduct in a public office.
The matter was adjourned until next month.
Sun chief reporter John Kay, 69, from north-west London, entered a not guilty plea to conspiracy to commit misconduct in public office.
The cases have been brought as part of Operation Elveden, Scotland Yard's investigation into alleged inappropriate payments and information leaks.
In a separate case, a former police officer pleaded guilty to misconduct in public office.
And in another matter, a public official admitted misconduct in public office.
More top news
The Tories are wiped out in the capital while Labour lost half their seats.
The Brexit Party and Liberal Democrats have had a night to remember while the Tories and Labour suffered a backlash.
Journalist Rachel Johnson and YouTuber Carl Benjamin also missed out on seats.