Plans for BBC Three have been officially submitted to the BBC Trust. If the plan goes ahead in its current form, the channel will become online-only.
The Beeb has also put forward plans for a new channel called BBC One+1. This would show programmes an hour before they're broadcast.
A petition to try and save BBC Three has attracted more than 265,000 signatures, but director of BBC Television Danny Cohen insists the move will go ahead as planned. He cites the fact that more people watch TV on mobile devices as proof that the move makes sense.
"The BBC Trust has now received the detail of proposals from the BBC Executive to close BBC Three as a broadcast channel and reinvent it as an online-only proposition," the BBC Trust said in a statement. "Alongside this, the Executive also propose launching a BBC One+1 channel, extending the hours for CBBC and enhancing BBC iPlayer."
The BBC Trust will launch a public consultation in January. BBC Three is likely to become internet-only next Autumn.
BBC Three started life as BBC Choice back in 1998. If it does get the axe, it will be the first BBC broadcast channel to ever close.