The couple has been seeing each other since filming Danny Boyle's 2008 Oscar-winning blockbuster, which saw their characters battling to be together.
London-based Patel said maintaining a relationship with the 25-year-old actress, who lives in Mumbai, means they both have to make an effort.
'We're never at home,' the Daily Express quoted the 21-year-old as telling Radio Times.
'But we do manage to meet. We always find time for each other,' he said.
And when they're in London?
'We always get a different place. Rent out a flat or something and spend time together that way,' he added.
Photograph: Lucas Jackson/Reuters
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