The former vice president will close out the convention, which is being held virtually due to the coronavirus pandemic, on June 6. The party also announced Thursday morning that Beto O'Rourke — the former Biden rival, U.S. Senate nominee and El Paso congressman — will speak on the convention's final day as well.

Biden, whose Texas primary win in March was part of a Super Tuesday romp that set him on the path to the nomination, has promised to compete in historically Republican Texas as the nominee. State party leaders hailed his appearance at the convention as a sign of the state's competitiveness in November.

“Texas is the biggest battleground state in the country," the party chairman, Gilberto Hinojosa, and vice chair, Carla Brailey, said in a statement. "With Joe Biden at the top of the ticket, Texas Democrats will help him win the White House. This is our moment.”

The party has built a high-profile lineup for the virtual convention, previously revealing speakers including U.S. House Speaker Nancy Pelosi and three other former 2020 White House hopefuls: Julián Castro, Kamala Harris and Elizabeth Warren. In addition to Biden and O'Rourke, the party announced Thursday morning that U.S. Rep. Hakeem Jeffries of New York, chairman of the House Democratic Caucus, will address the convention.

The Texas GOP is set to hold its 2020 convention in-person from July 16-18 in Houston.