UTA's "United Voices" rally, which will supplant the agency's annual Oscar party this year.
Jodie Foster, Michael J. Fox and Keegan-Michael Key
were among the speakers and performers.
Other speakers include Iranian-American author Reza Aslan, Tony winner Cynthia Erivo and Wilmer Valderrama.
UTA CEO Jeremy Zimmer and California Lt. Gov. Gavin Newsom also speak at the rally, outside UTA's Beverly Hills offices.