President Donald Trump will announce a dramatic expansion of TrumpRx.gov, a government-backed website offering discounted prescription drugs under his administration’s pricing deal, on Monday,  a White House official said.

According to Bloomberg News, the administration is adding generic medications to the website, and billionaire Mark Cuban is set to attend the White House event.

Cuban sells discounted medicines directly to consumers through his Cost Plus Drugs online pharmacy.

TrumpRx, launched in January, is part of Trump’s most-favored-nation deals with drugmakers aimed at lowering prescription drug costs to levels seen in other developed nations.

While Trump has pledged to make prescription drugs cheaper for Americans than anywhere in the world, prices on the website are not lower than those paid in the United Kingdom, ​according to a Reuters comparison of publicly available prices.

(Reporting by Daphne Psaledakis, Katharine Jackson and Michael Erman; editing by Michelle Nichols and Sanjeev Miglani)