A bride walked down the aisle to the tinny sound of Here Comes the Bride played on a mobile phone after the organist failed to get to the church on time.
Roof tiler Darren Medd realised he had the tune on his phone as a ringtone and started to play it when the ceremony was delayed.
But when the organist had not arrived 10 minutes later, the minister asked Mr Medd, from Merthyr Tydfil, to play the tune again into a microphone so Tracey Muxworthy could make her way down the aisle.
"I knew I had the bridal march on my phone so I stuck it on and everyone had a really good laugh," said Mr Medd, 35, a childhood friend of groom Ian Davies.
"About 10 minutes later the organist still wasn't there so the minister came and asked me if I could put it on again. I went to the front row and he brought a microphone round.
"It was probably the fastest wedding march you'll ever hear."
Miss Muxworthy's mother Joyce, from Penywaun, Aberdare, says her daughter, 30, had not been fazed by the unconventional musical accompaniment.
"My husband said she was smirking all over her face," she said.
The organist, who had believed the wedding on Saturday was at 4pm, not 3pm, arrived in time to play as the happy couple, who will live in Trecynon, left Green Street Methodist Church in Aberdare, UK.