West Indies have bowled Australia out for 131 to reach Sunday's final of the Twenty20 World Cup against home team Sri Lanka.
Chris Gayle inspired his team to a total of 205-4 with an unbeaten knock of 75 after winning the toss and deciding to bat first.
David Warner was the first to go for Australia, bowled by Samuel Badree for one run.
Marlon Samuels then caught and bowled Michael Hussey before Badree struck again to remove Shane Watson, leaving the Aussies on 29-3.
Denesh Ramdin did not relent when he came in to bowl, taking the wickets of Cameron White and David Hussey in quick succession.
Sunil Narine then got in on the act, as Matthew Wade was caught by Badree for the concession of one run.
George Bailey restored some hope for the beleaguered Australian side, bashing 63 runs from 29 deliveries, but was sent on his way after being caught by Andre Russell off the bowling of Kieron Pollard.
Pat Cummins, Mitchell Starc, Brad Hogg and Xavier Doherty were unable to affect proceedings at the Premadasa in Colombo, falling 74 runs short of the West Indies' total.
