Chris Uhlmann from 7.30.

Chris Uhlmann, formerly of 7.30, will become the new Virginia Trioli, who was the new Tony Eastley.

Just a week after being announced as the new presenter for ABC Radio's flagship current affairs program, Virginia Trioli has decided she is “unable to present AM” due to “family reasons”.

Instead, Trioli will remain on television as co-host of ABC News Breakfast on ABC 1 and ABC News 24, and former 7.30 political editor Chris Uhlmann will move to radio.

Uhlmann will replace Tony Eastley, who is leaving AM after 10 years to take up a new hosting position at ABC News 24 from mid-February.

ABC presenter Virginia Trioli returns to radio.

Short hiatus: ABC presenter Virginia Trioli returns to television.

AM has been the standard-bearer of ABC current affairs for nearly half a century. I am honoured and delighted to be asked to present it,” Uhlmann said in a statement.

“Tony Eastley leaves big shoes to fill but I will work hard to ensure that I maintain the excellence of the program. I have worked with Executive Producer David Burgess in the past and he is an outstanding journalist so I'll be in a safe pair of hands.”

Uhlmann will take over the AM microphone from Monday, February 10.

Trioli, a two-time Walkley Award winner, started her journalism career at The Age. She has also been a columnist for The Bulletin magazine and has hosted the drive shift on 774 ABC in Melbourne and the morning slot on 702 ABC in Sydney.

When her departure was first announced last week, she said she had mixed feelings about leaving the breakfast show.

“I must admit to mixed feelings as I leave News Breakfast enormously proud of our five-year-old program, the team and especially my colleague Michael Rowland, and our loyal, growing audience, and I thank them," Trioli said. "Now that my body clock is permanently set to a 3am alarm, the move seems just right."

On Thursday, ABC News Breakfast co-host, Michael Rowland, welcomed Trioli back to the chair on Twitter.

ABC Director of News Kate Torney said: “I'm really looking forward to the high quality broadcast journalism Virginia, Tony and Chris will all bring to their respective programs in 2014.”

Uhlmann was most recently the senior political editor for 7.30 and previously co-hosted 666 ABC Canberra's breakfast program, produced Mornings on 774 ABC Melbourne and worked as the chief political correspondent for ABC radio current affairs.