Jill Stein was officially chosen by the Green Party Saturday as its nominee for president at the party's convention in Houston.

"I'm honored beyond words to be your candidate, and I'm so honored to be running for president of the United States with the Green Party — the only party of, by and for the people," she said to the audience.

The Greens comprise a progressive party that is dedicated to promoting environmentalism and social justice.

Stein has hedged her long-shot campaign on record dissatisfaction with the two major party candidates running for the White House: Republican nominee Donald Trump and Democratic nominee Hillary Clinton. She has also reached out to disaffected supporters of Bernie Sanders, many of whom feel cheated by the Democratic Party after a WikiLeaks email dump revealed party officials actively discussing how to subvert his primary campaign against Clinton.

There were reports that her campaign was vetting Bernie Sanders surrogate and former Ohio state Sen. Nina Turner for vice president. However, Turner declined to run, saying she still wishes to remain a Democrat, which led to Stein offering the running mate spot to left-wing activist Ajamu Baraka.

Still, Stein used her acceptance speech to express her gratitude to Sanders for starting a "political revolution" against the media and establishment political structures, such as the Democratic National Committee, that she said her campaign will continue.

"It is such an honor to be also running in alliance with the Bernie Sanders movement, that I now hear called as 'Berning Green," Stein declared.

In a four-way race for the White House, Stein trails all the other candidates in a RealClearPolitics average of polls with 4 percent support, behind Democrat Hillary Clinton (43 percent), Republican Donald Trump (36.7 percent) and Libertarian Gary Johnson (8.4 percent). The Green Party has qualified to appear on the ballot in 21 states, according to Ballotopedia.

Stein and Johnson both are below the 15-point polling threshold to make the first debate stage on Sept. 26, and suffered a defeat in challenging that threshold Friday when a district court rejected their case against the presidential debate commission.

Stein was also the party's nominee in 2012, when she earned 0.36 percent of the popular vote.