Haim. (Photo by Bella Howard)

When Haim played U Street Music Hall in February, the ultra-fashionable, enviably coiffed sisters Este, Alana and Danielle Haim were on the verge of becoming the buzz-stealing rock band of the year.

Now, it's official. After the fall release of Haim's major-label, full-length debut, "Days Are Gone," the L.A. rockers (who built their name opening for Mumford & Sons, rubbing shoulders with the Strokes and hobnobbing with Florence and the Machine) are slated to play "Saturday Night Live" this weekend, and then return to a wild, worldwide tour with Phoenix.

So, you'll want to get tickets now -- as in right now -- for the band's 9:30 Club headlining show on May 8. After a fan club pre-sale earlier this week, "Artist Early Sale" tickets are now available at $25 a pop if you click through Haim's Web site.

Read: Review: Haim’s ‘Days Are Gone’ is a casually great pastiche of the past