The launch will see the chain use Ocado's recently opened distribution centre in Warwickshire for deliveries through a Morrisons-liveried fleet.
The 25-year deal, which involves Morrisons paying up to £170 million to Ocado to acquire the site and equipment, is controversial because Ocado is already linked with Waitrose, exclusively delivering the supermarket's products.
Morrisons chief executive Dalton Philips said: "This agreement is a significant strategic step for Morrisons.
"From a standing start, Morrisons will be competing in the fast-growing online channel by the end of this year with a really compelling proposition.
"The customer gets our affordable fresh food delivered by Ocado's state-of-the-art distribution system."
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