Hot seat reshuffle! Allison Langdon’s A Current Affair replacement officially announced – less than a year after she joined the show as new host

Allison Langdon is stepping down from her hosting duties at A Current Affair to take some much-needed annual leave.

The Channel Nine star, who joined the show at the start of this year, will be replaced by veteran journalist and former 2GB radio presenter Deborah Knight.

'A few weeks in the hotseat of @acurrentaffair9 while @allisonlangdon enjoys a break. Switch!' Deb wrote in an Instagram post on Tuesday.

It's unclear how long Ally will be gone, but it appears it will only be for the summer holidays.

Last year, Allison announced her departure from the Today show after three years so she could start her new role as host of ACA in January this year.

She revealed she had received priceless advice from the woman who took the coveted seat after 17 years at the helm: Tracy Grimshaw.

“I spoke to Trace a lot in the run-up to the presenter announcement and I remember a conversation we had as she drove up for her final show,” she told The Herald Sun.

“She said, 'Just be yourself, Ally, and follow what you want to follow.'

Allison went on to say that Tracy advised her to know her audience.

“She told me to listen to the ACA audience; they are smart, they know what they are talking about, but find your own way and be authentic,” Allison explained.

Channel Nine confirmed in December that Ally would be leaving her co-hosting role on Today to replace outgoing ACA presenter Grimshaw.

60 Minutes reporter Sarah Abo stepped in to fill Ally's spot alongside Karl Stefanovic as the new co-host of Today.

Ally denied rumors of a 'professional rivalry' between herself and former colleague Stefanovic, describing him as a 'brother' to her.

She has since settled into her role at ACA, with viewers praising her compassionate approach to difficult stories.