BBC One and BBC Two will be available to watch live on the internet from next week.
The channels will be accessible on www.bbc.co.uk and on internet-enabled devices such as mobile phones.
They join BBC Three, BBC Four, CBBC, CBeebies and BBC News, which are already streamed on the web.
Research by Ofcom revealed that the number of people watching television online doubled over the past 12 months.
Jana Bennett, director of BBC Vision, said: "The launch of BBC One and BBC Two online completes our commitment to make our portfolio of channels available to watch on the internet.
"From November 27, licence fee-payers will be able to watch BBC programmes, live, wherever they are in the UK on their computers, mobile phones and other portable devices.
"Through iPlayer and series stacking, they'll have the option to catch up with them later."
The channels are being put online as part of a one-year evaluation period.
They will only be available to internet users in the UK, and anyone watching or recording broadcasts must, by law, have a television licence.
Will this appear on Iphone?
The channels will be accessible on www.bbc.co.uk and on internet-enabled devices such as mobile phones.
They join BBC Three, BBC Four, CBBC, CBeebies and BBC News, which are already streamed on the web.
Research by Ofcom revealed that the number of people watching television online doubled over the past 12 months.
Jana Bennett, director of BBC Vision, said: "The launch of BBC One and BBC Two online completes our commitment to make our portfolio of channels available to watch on the internet.
"From November 27, licence fee-payers will be able to watch BBC programmes, live, wherever they are in the UK on their computers, mobile phones and other portable devices.
"Through iPlayer and series stacking, they'll have the option to catch up with them later."
The channels are being put online as part of a one-year evaluation period.
They will only be available to internet users in the UK, and anyone watching or recording broadcasts must, by law, have a television licence.
Will this appear on Iphone?