Georgie Gardner said she was "disappointed" to be dumped as co-host of the Today show as Nine moves to bring back former host Karl Stefanovic to stem a steep decline in ratings.

Gardner, who was appointed co-host along with Deborah Knight in January 2019, said she was proud to have been part of the "first female hosting duo in Australian breakfast television" and "naturally disappointed" it didn't work out.

Georgie Gardner is saying goodbye to Today. Credit:Nine

"I learned a lot. I have no regrets, even though the scrutiny and public discourse has been daunting and disproportionate. It's also at times been cruel," Gardner told Nine.

Thanking her colleagues and viewers for their kindness and support, Gardner said she planned to return to news and "catch up on some sleep".