‘Monsters’ star Cooper Koch didn’t wear prosthetic in ‘Menendez’

Nearly a month after “Monsters: The Lyle and Erik Menendez Story” premiered on Netflix, breakout star Cooper Koch finally revealed whether he actually bared all in the series’s viral shower scene.

“Mine was not a prosthetic,” Koch blurted out during an appearance on “Watch What Happens Live” Monday while host Andy Cohen counted down Hollywood’s “top five most iconic full-frontal moments.”

As Koch smirked and pointed toward the camera, Cohen said, “That was going to be my next question! Congratulations to you, Cooper. You’re very blessed, aren’t you?”

“Well, hung,” the openly gay actor, 28, cheekily replied with a smile, using a slang term for well-endowed.

Koch, who also ditched his clothes in the 2022 indie horror film “Swallowed,” stars as Erik Menendez in “Monsters,” which shot to No. 1 after its Sept. 19 streaming debut.

The nine-episode Ryan Murphy-co-created show chronicles the real-life 1989 murders of multimillionaires José (Javier Bardem) and Kitty Menendez (Chloë Sevigny) by their sons, Lyle (Nicholas Alexander Chavez) and Erik.

The brothers, who were sentenced in 1996 to life in prison without parole, have long maintained that they shot their parents to death to end the years of sexual abuse they allegedly endured.

“I believe both of them,” Koch, who recently visited Lyle, 56, and Erik, 53, behind bars with Kim Kardashian, told Vanity Fair earlier this month. “I believe everything that they said on the stand to be true.”

Koch’s co-star Chavez, however, has stayed mum on his thoughts about the controversial brothers, whose case is currently under appeal by the Los Angeles County District Attorney’s Office.

“I came to a really unique conclusion, but I’ve also come to the conclusion that I don’t really want to share what that is with anyone and that I really want to keep that part of my artistry and my interpretation to myself,” Chavez, 25, told the magazine.

From prison, Erik has slammed “Monsters” as a “dishonest portrayal” of his and Lyle’s story — but also admitted he has not watched it.

In response, Murphy, 58, defended his dramatized project as “the best thing that has happened to the Menendez brothers in 30 years.”