A friend of Stormy Daniels said Monday that the former adult film star kept the dress that she wore on the night of her alleged affair with President Trump.

Alana Evans, a fellow adult film star and longtime friend of Stormy Daniels, told CNN's Jim Sciutto on Monday that although she could not account for other evidence Daniels gathered, she knows her friend still has the dress that she wore on the night she claims to have had sex with Trump in 2006.

"I am unaware about text messages or pictures or any type of evidence she might have that would fit on a disk," Evans said. "All I know is that Stormy still has the dress that she wore from that night."

Evans said she may have kept the garment for a number of reasons, including as a "keepsake" or possibly as "actual proof."

"I can only speculate the things that may be on that dress, especially if it's never been washed," Evans told Sciutto.

Daniels, whose real name is Stephanie Clifford, told CBS' "60 Minutes" during an interview that aired Sunday that she met Trump at a celebrity golf tournament in Lake Tahoe in July 2006 and the two had consensual unprotected sex.

During the interview, Daniels said someone verbally threatened her about keeping quiet about her sexual encounter with the president.

On CNN Monday, Evans said it was the first time she had heard of that specific threat against Daniels, although she knew of other threats that the adult film star had received.

"I know of other threats that have been received, the e-mail and things like that, but I hadn't heard about this before," Evans said.

Former White House intern Monica Lewinsky famously kept the blue cocktail dress she wore while having sexual relations with President Bill Clinton in the Oval Office.