The awards were scheduled to be presented at a Thursday night ceremony at the Henry Fonda Music Box Theatre in Hollywood.
Kilmer won in the feature film performance category for his work in last year's "The Salton Sea," about a man who drifts into drug use after his wife is murdered. The nod for feature film went to "Skins" about two Sioux brothers living on a reservation.
Mac won the TV comedy series performance for his role on the Fox sitcom "The Bernie Mac Show," which also won for comedy series multiepisode story line. CBS' "Yes, Dear" was recognized in the single-episode category.
Tim MAtheson and John Spencer of NBC's "The West Wing" and "ER's" Noah Wyle were recognized in the drama series performance categories. The nod for multiepisode story line went to NBC's "ER," while Lifetime's "Strong Medicine" won for single-episode.
In the music category, it was a tie between Ivan Neville's "Ode to 5 a.m." and Kenny CHesney's "The Good Stuff." DC Comics' "Catwoman" was hailed in the comic book category.
Highlights of Thursday's ceremony will air May 25 as an hour-long special on FX.