The Los Angeles Times said the former "Roseanne" star registered with the Federal Election Commission last month after announcing in August her intention to run for America's top office because she is frustrated with both the Democratic and Republican parties.
The Washington Post said Barr came in second after physician and environmentalist Jill Stein in a presidential nomination poll conducted on the Green Party Watch Web site.
"I run in support of The Green Party & probably of Jill Stein -- hopefully I can be of service by speaking on media about a viable choice 4 voters," Barr said via Twitter. "jill has already named a vice. i'm just in it to support the greens and their fine american message."
The party is to choose its nominee in July.