Actor Chris Pratt was spotted singing country music tunes at two honky tonks in Nashville Thursday night.

After 11:30 p.m., Pratt showed up at Robert's Western World and joined singer and musician Sarah Gayle Meech on stage. The "Guardians of the Galaxy" star sang Johnny Cash's "Folsom Prison Blues," while Meech played the guitar.

"He was super nice and really friendly," Meech said, adding that he was a polite and awesome person.

Meech posted a photo, thanking Pratt for showing up.

"You never know who will show up at Robert’s Western World... Thank you @prattprattpratt you made our night!" Meech said.

Later, he was seen singing at Tootsie's Orchid Lounge on Broadway.

Pratt performed Garth Brooks' "Papa Loved Mama" at Tootsie's.

Chris and JoJo Davis, from Washington, were visiting Nashville and happened to be at Tootsie's when Pratt appeared. They heard someone say to welcome the leader singer of Mouse Rat, in reference to Pratt's role on "Parks and Recreation."

"It's almost like you don't believe it," Chris Davis said. "I don't think everyone in the crowd knew the Mouse Rat reference."

JoJo Davis said he hung out for a bit before walked out, giving everyone high fives while leaving.

"You hear stories of people popping in and singing. We didn't think we'd experience it," she said. "It made our Nashville trip."

Instagram user @lesliewr posted a photo of Pratt singing at Tootsie's.

"Are you kidding me... resident #avengers nerd," @lesliewr said. "He came, he rocked, he owned."

Nolan Ryan is a summer intern with the Tennessean and a senior at Hillsdale College in Michigan. You can reach him at nryan@gannett.com.