Rumer Willis Recalls Her 'Awful' Audition for Blake Lively's 'Gossip Girl' Role

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You win some, you lose some.

After Gossip Girl casting director David Rapaport recently revealed that The CW initially wanted Rumer Willis to play Serena van der Woodsen and Ashley Olsen to portray Blair Waldorf -- the roles that eventually went to Blake Lively and Leighton Meester, respectively -- Rumer is dishing on her "awful" audition.

"I felt like I did an awful audition back then," Rumer admits to People. "I was so young and it was, like, one of the first things I'd ever auditioned for."

WATCH: Rumer Willis Has a Fun Night Out in NYC With 'Bachelor' Star Chris Soules

"My sisters and I were huge fans of the books -- huge, huge fans so I remember we were just so excited when they said they were doing a TV show," she adds.

The now 27-year-old actress was actually taken by surprise by Rapaport's revelation.

"That's so crazy -- it's pretty cool," she says, also noting that "Blake and Leighton did an incredible job."

But clearly, this recently unearthed tape of Blake's Gossip Girl audition proves that the role was pretty much meant for the blonde bombshell from the start.

"I had seen her in Accepted and at that time, there were no Lena Dunhams or Zooey Deschanels," Rapaport told BuzzFeed about Blake's casting. "It was all about beauty and glamour, but being approachable and Blake was the ultimate It Girl."

Obviously, Rumer is doing more than OK for herself these days. The eldest daughter of Demi Moore and Bruce Willis was crowned Dancing With the Stars' season 20 champ, and recently made her Broadway debut as Roxie Hart in Chicago.

WATCH: Entire Willis Family Supports Rumer's Broadway Debut -- Including Demi Moore and Bruce Willis' Wife Emma Heming

When ET caught up with her in July, she opened up about being so vocal against cyberbullying.

"When I was a kid you didn't have Twitter or Instagram where as soon as you walk out of a building a photo of you is up within two minutes or a million people are commenting and saying nasty things," Rumer explained. "I found a different confidence because I realized that you can't base your self-worth on the opinions of others."

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