Muldoon was known for his roles as Austin Reed and Richard Hart in the television series "The Best of Us" and "Melrose Place" in the 1990s.
He also starred in films such as "Starship Troopers" (1997) and "Marlowe" (2022). His last film was "Murder at Hollow Creek," which was released in 2024, but another film, "Dirty Hands," is scheduled to be released later this year.
Muldoon died of a heart attack on Sunday. He was 57 years old.
