Corrs put boys in the picture; Support role ticket to stardom.
The five-piece have signed up to support the band's Irish and UK tour which kicks off tonight in Belfast.
Starting tomorrow night at Dublin's Point Theatre, and including three London Wembley dates, Picture House will end up playing to more than 150,000 people in a matter of weeks.
Heavyweight rocker Meatloaf has also signed Picture House to support him in Germany later this year.
Singer Dave Browne said last night: "That's not bad for a band who have only sold about 60,000 records and only signed a major record deal last year.
"Things have just gone through the roof.
"We've played with The Corrs before but nothing on the scale that is to come.
"Them asking us to play support is a tremendous boost to our career."
The band, who have toured twice before with The Corrs, have also done support for Bon Jovi, The Kinks and Texas.
The band, whose album Karmarama was recently released, have also learnt that one of their top 30 hits is to be used in a major TV and radio campaign.
Food store giant Centra have brought up the rights to use Sunburst in an exclusive two-year deal worth more than pounds 40,000.
The Corrs, who have been supporting the Rolling Stones on their own tour, start the Irish tour tonight with a sell-out show at Belfast's King's Hall.
Lead singer Andrea said: "We love coming back home to Ireland. It's THE big show for us as far as we are concerned.
"The concerts are going to be great. We are looking forward to performing in both Dublin and Belfast."