Imbruglia, 28, and Johns, 24, wed at the Thala Beach Lodge on the Australian northeast coast.
Her musical career took off with her chart-topping single "Torn" from the multi-platinum-selling 1997 album "Left of the Middle."
In 2003, Imbruglia starred in the comedy "Johnny English," a successful international film.
Johns' debut album, "Frogstomp," released in 1995 by his grunge band, sold more than 1 million copies. Silverchair has received critical acclaim for their follow-up albums, including "Diorama, Neon Ballroom and Freak Show."
In what has become common practice, the newlyweds will sell one snapshot of their wedding with proceeds going to their favorite charity.
Notable deaths of 2014 [PHOTOS]