Country star Willie Nelson headlines Beto O'Rourke rally with song 'Vote 'Em Out'

AUSTIN, Texas (KTRK) -- Democratic Congressman Beto O'Rourke joined thousands of supporters in Austin during a rally with country star Willie Nelson providing the tunes.

The singer posted a photo on Twitter of Saturday's event, where he performed a song called "Vote 'Em Out."

Earlier in September, Nelson received backlash from fans after they learned he would be headlining O'Rourke's rally.

RELATED: Willie Nelson attacked by fans online over upcoming Beto O'Rourke rally appearance in Austin

The country music legend is set to headline an event in Austin for Democratic Senate hopeful Beto O'Rourke.

After dozens of fans weighed in on his Facebook page, the music legend responded to their uproar.

"Everybody has an opinion. Everybody has a right to an opinion. I think I have one too," Nelson said.

RELATED: Willie Nelson responds to fans uproar over his support for Beto O'Rourke

Willie Nelson reacts to the uproar over his support for Beto O'Rourke

According to O'Rourke, Saturday's rally had a great turnout.