The 28-year-old 'Wish You Were Here' singer and the 30-year-old Scotsman left the hotel in separate taxis before meeting up to watch Coldplay perform at the Allianz Stadium in Sydney.
The UK's Daily Mail referred to the dashing bloke as Delta's "boyfriend", but even that's a bit iffy.
The pair never officially confirmed they were dating after meeting on The Voice earlier this year. They were even spotted in LA together as recent as August (see above pic).
However, the rumoured lovers "broke up" three months ago, according to a Daily Telegraph report.
In any case, they seem to be enjoying each other's company.
"Beyond incredible Coldplay in Sydney!!!!! Could watch them all night, so insane, amazing, just inspiring xoxo," Delta tweeted after the concert.
"Coldplay showing why they are the number one band in the world right now #Sydney," Darren wrote on his page.
No mention of Darren when we chatted with Delta a few weeks ago about her most personal album yet, Child of the Universe. But she did talk about their colleague Keith Urban leaving the hit TV talent show watch below.
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