They posed with others, including LACMA co-chair Eva Chow.
The couple has been publicly dating for 10 years, starting in 2015.
The LACMA Art+Film Gala honors influential figures in the art world and highlights their achievements.
This year, sculptor Simone Leigh and film director Baz Luhrmann received awards.
Singer Charli XCX performed, and actors Lee Soo Hyuk and Moon Ga Young were also present.
