Marvin Humes and Rochelle Wiseman have been dating on-off since March 2010

Rochelle Wiseman is wearing a sparkler on her third finger left hand and JLS fans are desperate to know if Marvin Humes has popped the question.

But Marvin's band mate Oritsé Williams has revealed Rochelle's new accessory is not an engagement ring. 

'It's kind of like a promise ring for Marvin,' says Oritsé, 24.

'It's one step down from an engagement and kind of like a test before the real deal goes ahead.

'Marvin and Rochelle are really happy together. They're great right now.'

Marvin, 25, and Saturdays singer Rochelle got together in March 2010 but split in November.

They reunited in January and last month attended their first ever premiere together - where they nervously laughed off engagement rumours.

'The pressure's on you for that bit,' Rochelle, 22, told her man when questioned about a possible wedding.

'I'm just going to be
quiet. We've never ever been to a premiere as a couple before, so this
was our big day, wasn't it babe?

'It got me in the mood for wanting a
really nice dress.'

Rochelle Wiseman ring | Pictures | Photos | Celebrity News

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Esme Riley