How to get loads of pet hair off my couch?

I have two cats that love to sit on my couch and now my couches are loaded with hair..i can't even sit on my couch...Im wondering is there something besides a lint roller that i can use...I heard about the Pledge Fabric Sweeper but I can't find it anywhere in nyc..I need some serious suggestions because i have more people visiting me now and they can't even sit down...Any thing i can use on my couches?