Corey Bohan appeared in four episodes of The Hills with Audrina Patridge

Audrina Patridge's on/off romance with Corey Bohan is over.

The Hills star and the BMX racer dated briefly last year before getting back together in June.

‘She is single,' her rep tells E! Online.

Audrina, 24, and Corey are thought to have split because of conflicting schedules.

‘They broke up amicably a few weeks ago and are still friendly,' a source tells People. ‘It's mainly to do with their busy schedules.

'She's constantly filming, and he spends six months out of the year in his native Australia.'

Audrina has previously been linked to reality star Brody Jenner and actor Chris Pine.

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