Washington, Jan 9: Gerard Butler was left red faced at his sister's wedding after accidentally flashing his manhood while wearing a traditional Scottish kilt.

The 'Gamer' star performed a reading at his sibling's marriage ceremony and he accidentally diverted the attention away from the bride by revealing all.

"I wore a kilt in my sister's wedding in Paisley, Scotland and I had to go up and do a reading and my mother and family were in the front row," Contactmusic quoted him as telling U.K. talk show host Graham Norton.

"As you know in Scotland there's a certain rule to wear a kilt so I'm sitting like this (legs open) and everyone's leaning forward and my mum's looking at me and she's doing this (puts hands together) and I think she's telling me to pray... and then I realise everyone is staring right (at my crotch). So I (cross my legs)... It's always a disaster," he added. (ANI)