Breakthrough pop artist Gabriella Cilmi and hotly tipped indie band the Temper Trap will lead Australia's biggest ever contingent to the South by Southwest festival (SXSW) this March.

At deadline, 30 Aussie acts had committed to showcase at the Austin, Texas music event this March 18-22.

The confirmed lineup includes a mix of established acts such as Josh Pyke, the Drones and the Grates, alongside rising bands such as Birds of Tokyo, the Boat People and performer Andy Bull.

Cilmi, whose debut song "Sweet About Me" (Island) has been a global hit, sees SXSW as a critical platform to set up her album "Lessons to be Learned," which is due for a U.S. release on March 17. "It's one of those hot places to be right now, because a lot of good music is coming out of Australia," she tells Billboard.biz.

The six-time ARIA Award-winning singer will play two shows, including a set at the March 20 Aussie BBQ 2009 at Brush Square Park. "It should be a lot of fun," she says. "It's going to be really cool for me, because I'm just going to go watch gigs every night and just hang out. I'm really excited."

According to SXSW Australasian representative Phil Tripp, the number of bands and size of the delegation (200-plus) attending SXSW represents a ten-fold increase from seven years earlier. "It's amazing the artists who have been launched by that appearance," he says. "John Butler Trio got his record through there, and Wolfmother took off. We have a really great history of getting results."