June 17, 2010 12:35 PM

Albert Michael/Startraks

It’s a girl for the Guncles!

Bill Horn and Scout Masterson, Tori Spelling’s dear friends and regulars on her reality show Tori & Dean: Home Sweet Hollywood, have welcomed daughter Simone Lynn Masterson-Horn, who was born last week weighing 6 lbs., 2 oz. and measuring 18 inches long.

Simone is the first child for the couple, whom Spelling lovingly refers to as “Gay Uncles” to Liam, 3, and Stella, 2, her kids with husband Dean McDermott.

“Dean and I are beyond happy that Scout and Bill’s dreams of becoming parents have come true. Little Simone couldn’t have two better loving and deserving dads,” Spelling tells PEOPLE exclusively.

“Her cousins Liam and Stella are anxiously waiting to meet her. Stella kisses pictures of her that Guncle Billy and Scouty send us.”

Horn, 38, and Masterson, 35, who married in May 2009 at a Palm Springs, Calif., wedding planned by Spelling herself, began the adoption process last year. They declined to reveal details of their experience in order to protect the privacy of Simone and her birth mother.

“We are in awe of Simone and thrilled that our dream of becoming parents has finally come true,” the couple — who just finished taping season five of Oxygen’s Home Sweet Hollywood — tell PEOPLE. “From the moment we saw her we instantly fell in love — she has us wrapped around her little fingers.”

The infant already has a nickname: “Nugget” or “Nugget of Love,” says Horn. “I sing Sade’s ‘Soldier of Love’ to her and replace the word ‘soldier’ with ‘nugget.’ Yup — she’s already embarrassed by me.”

And how did they choose her real name? “We found it in a baby name book under a list of ‘Activist Names,'” says Horn. “We liked that the name denotes a strong woman. Plus we love Nina Simone.”

— Alexis Chiu

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