He's not kidding this time: Donald Trump is officially running for president.

On Tuesday, a day after Jeb Bush announced his candidacy for the 2016 Republican nomination, the real estate mogul and Apprentice host followed suit, telling an assembled crowd of reporters and supporters outside Trump Tower in New York City: "I am officially running for president of the United States, and we are going to make our country great again." The declaration reflects Trump's official campaign slogan, which is "Make America Great Again."

Trump also disclosed his financial net worth on Tuesday, with assets totaling $9 billion, The Washington Post reports.

Summer TV Preview: Get hot scoop on must-watch new shows

Trump, whose recent political contributions include insisting on seeing President Obama's long-form birth certificate, has repeatedly threatened to enter presidential races in the past, including in 1988, 2000, 2004 and 2012, but always ultimately decided not to. He is the 12th person to announce a candidacy in 2016.

After Trump's announcement, an NBC spokesperson told The Hollywood Reporter that the network plans to "re-evaluate Trump's role as host of Celebrity Apprentice should it become necessary, as we are committed to this franchise." (NBC, which renewed Celebrity Apprentice earlier this year, is required to give equal screen time to all presidential candidates.)

The Democratic National Committee issued a smirking response to Trump's announcement, saying: "Today, Donald Trump became the second major Republican candidate to announce for president in two days. He adds some much-needed seriousness that has previously been lacking from the GOP field, and we look forward to hearing more about his ideas for the nation."

TODAY'S VIDEO: Kellan Lutz teaches us how to make slime!