MULLINGAR is today gearing up for its biggest wedding of the year as One Direction mania is expected to take over the town.
Hundreds of teenage fans are expected to flood into Westmeath ahead of the wedding of Niall Horan's brother Greg this afternoon.
The 19-year-old will be best man when Greg ties the knot with Denise Kelly at St Michael's Church in Castletown Geoghegan at 1pm.
Florists turned up to from 10.30am to start getting ready for the lavish nuptials which will be guarded by number of security guards.
After the church wedding, the party of 150 family and friends will head to Lough Rynn Castle in Leitrim - the same place where Amy Huberman and Brian O'Driscoll tied the knot in July 2010.
This morning there was plenty activity at the Horan household as they congregated at the family home in Mullingar, with a source telling the Irish Independent that the wedding was being filmed for an upcoming 3D One Direction movie.
Hollywood director Morgan Spurlock was spotted at the Horan house with a crew of cameramen who were under orders not to talk to fans.
Niall took his duties seriously on the day and was seen in Mullingar town early this morning to collect a guitar to bring to the service.
The best man drove the groom and groomsmen to the church in his black Range Rover and there was pandemonium as they arrived at 12.40.
Niall, followed by a camera crew who are shooting scenes of him while he's home for the One Direction 3D movie, was singing popular Busted song, 'The Day I Crashed The Wedding' as he parked the car.
The singer kept his head down as he walked into the church, but made sure not to disappoint the 100 waiting teenage fans by signing a couple of autographs.
The Horan brothers wore grey suits with red and white striped ties.