Second Division Forfar secured their passage into the second round of the Co-operative Insurance Cup at the expense of First Division Stirling with a 2-1 success.
The home side had the chance to claim an early advantage but Michael Mullen could only shoot over the bar from six yards and they were made to pay for that miss as Forfar took the lead after 16 minutes through Iain Campbell's low left-footed strike.
Derek Colquhoun could have levelled matters four minutes before the break but he headed wide from 12 yards.
Athletic doubled their advantage after 51 minutes when Dale Hilson crossed for Ross Campbell to slot home from close range.
Nathan Taggart did pull one back for John O'Neil's team from close range with 25 minutes to go but they could not get back on level terms.