Them Crooked Vultures -- the supergroup of Dave Grohl, Led Zeppelin's John Paul Jones and Queens of the Stone Age's Josh Homme -- kicked off the start of a brief American tour in Los Angeles this week. The band, who just released their heavy, self-titled debut album, got the chance to show off their skills to around 2,000 fans at the sold-out Wiltern on Tuesday.

"Ladies and gentlemen!" was Homme's opening greeting to the crowd -- which included actor Breckin Meyer and Homme's wife, Brody Dalle -- before he provided an introduction. "We're a new band called Them Crooked Vultures and we're gonna have a good time."

The band whipped out a host of their new ones including 'Dead End Friends,' 'Elephants' and 'Caligulove' throughout their nearly two-hour set. Slash managed to sneak into the gig three songs in, wearing a backward baseball cap and with his hair in a ponytail. Before the set ended, he revealed on Twitter that he was impressed, writing "Them Crooked Vultures at the Wiltern, F---ing genius."

With only a handful of dates, including ones at Britain's Reading and Leeds festivals over the summer, under their belt, Homme offered a second introduction to the group three-quarters into the night.

"This is Mr. Dave Grohl on drums," he said before introducing the rest of the band, which included touring guitarist and songwriter of Adam Lambert's 'Time for Miracles,' Alain Johannes.

The group carried on for a handful of additional songs including 'New Fang.' A piano solo by Jones ended the first part of the set and Homme joined the bassist center stage for a hug before the group departed, returning a short while later for a brief encore. The band now have three more American dates in Oakland, Seattle and Portland, Ore. before they head to Europe and Australia.