A sizable number of millennials who supported Bernie Sanders are supporting the would-be first woman president — but it's not Hillary Clinton.

Millennials are flocking to Green Party candidate Jill Stein at an unprecedented rate. She received 15 percent of the national Gen Y vote, according to a McClatchy-Marist poll released Wednesday.

Among the youth vote, Stein beat Libertarian Gary Johnson, who garnered an impressive 13 percent and was within single digits of Donald Trump's 22 percent. Hillary Clinton had 38 percent of the millennial vote, far behind President Obama's 60 percent in 2012.

Most of Stein's support comes from independent liberals who supported Sanders in the primary, but did not have any loyalty to the Democratic Party. They refuse to fall in line with Clinton, whom they view as a corporate war hawk.

This isn't the Green Party nominee's first go-around at presidential politics. She ran for the presidency in 2012 and received 469,628 votes, or 0.36 percent.

With her massive support from Bernie Bros, it looks like she'll do a lot better this time.