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Uzo Aduba, Lea DeLaria, Netflix Emmy After Party

Eric Charbonneau/Invision for Netflix/AP Images

Uzo Aduba isn't only preparing her pipes for The Wiz.

Lea DeLaria exclusively tells me that her Emmy-winning Orange Is the New Black co-star is going to be singing at her and wife-to-be Chelsea Fairless' wedding.

"Uzo and I have known each other for years," DeLaria said yesterday at the Emmys. "We've done a couple of musicals together…We love each other. Chelsea and I had a conversation about who we really want to sing at our wedding and we both went, 'Uzo.' I asked and she said of course, she'd be honored."

Aduba will perform the Oscar-nominated ballad "I'm Calling you" from the 1987 film Baghdad Café.

"It's one of my favorite songs," DeLaria said.

Chelsea Fairless, Lea DeLaria

Rich Polk/WireImage

DeLaria said her and Fairless' big day is shaping up to be quite a big affair with a seemingly never ending guest list. "It's going to be ridiculous," she said. "Have you seen my cast? Just the cast alone makes it 200."

DeLaria announced their engagement in February during the American Songbook series at Lincoln Center in NYC.

"We met through Orange," she told E! News at the time. "Her dear friend plays Leanne on the show. She introduced us and we've been together ever since. It's been two and a half years. I proposed to her. Everyone saw how emotional I was at the SAG awards. I was so filled with love. I turned to her at the Netflix party that night and asked her to marry me. We announced it to all of our friends there."

She also revealed that fellow funny lady Sandra Bernhardt will officiate and Jesse Tyler Ferguson will be her best man.

As E! News exclusively reported, Aduba will play Glinda the Good Witch in NBC's live production of The Wiz airing on Dec. 3. The cast also includes Amber Riley, Queen LatifahMary J. Blige and David Alan Grier, as well as newcomer Shanice Williams as Dorothy.

(E! Online and NBC are both part of the NBCUniversal family.)