Hillary Clinton praised Kamala Harris as the newly announced vice presidential pick and urged her supporters to have "her back."

"I'm thrilled to welcome @KamalaHarris to a historic Democratic ticket," Clinton tweeted Tuesday. "She's already proven herself to be an incredible public servant and leader. And I know she’ll be a strong partner to @JoeBiden. Please join me in having her back and getting her elected."

Four years ago, Clinton made history as the first woman to win a major party's nomination for president. Harris will also break new ground as the first Black woman to be a vice-presidential pick for a major party.

BIDEN TAPS KAMALA HARRIS AS RUNNING MATE, SETTING ASIDE TENSIONS FROM PRIMARY

Harris, a U.S. senator from California, initially ran for president in 2019 but her enthusiastic start soon fizzled and she dropped out of the race before primary voting began this year, citing a lack of funds.

Clinton's loss to President Trump shocked the world in 2016. But the former Secretary of State will be making a comeback next week when she speaks at the Democratic National Convention on Wednesday.

DEMOCRATIC CONVENTION SPEAKERS ANNOUNCED AS BIDEN VP DECISION LOOMS