Defense Department General Counsel Jen Johnson will serve as the keynote speaker at the Pentagon's first ever Gay Pride event on Tuesday.

The hour-long 1PM event is scheduled to take place in the Pentagon auditorium. Johnson will be followed by a moderated panel discussion titled The Value of Open Service and Diversity.

Johnson, the Pentagon's top lawyer, co-chaired the 2010 study of how repeal of “Don't Ask, Don't Tell” would affect the military.

A poster announcing the event quotes Secretary of Defense Leon Panetta as saying, “Diversity is one of our greatest strengths. During Pride month and every month, let us celebrate our rich diversity and renew our enduring commitment to equality for all.”

The department did not say whether Panetta would attend the event.

Last week, Panetta released a video thanking gay service members for their service and recognizing June as Gay Pride month.

(Related: Elaine Donnelly condemns Leon Panetta's promotion of Pentagon Gay Pride.)

The celebration comes just 9 months after the military ended its policy which banned gay and bisexual troops from serving openly. Nearly 14,000 service members were drummed out of the military for violating “Don't Ask, Don't Tell” before it ended last September.