Ambitious news presenter Katie Couric is said to be eyeing up Diane Sawyer's hot seat on ABC World News.
The 54-year-old newswoman serves as a special correspondent for the network - but according to insiders is keen to fill in for anchor Sawyer, 65, when she is away.
A source told the National Enquirer: '[Couric's] time as anchor on CBS wasn't very successful, but she'd like to show she can still do it,' but added Sawyer would be 'very unhappy if they use Katie as her substitute when she's off.'
Meanwhile a source close to Couric slammed the reports telling MailOnline: 'Katie had the choice of staying at Eve News and she chose to leave to own her own daytime show, something almost no one has had.''She never had any interest in doing World news on ABC and the whole nonsense about Diane wanting to keep Katie from that program is totally fabricated.'