ENTERTAINMENT
01/10/2015 01:30 pm ET Updated Jan 10, 2015

Blake Lively Tricked Amber Tamblyn About Her And Ryan Reynolds' Baby's Birth

Frank Micelotta/Invision/AP

Blake Lively and Ryan Reynolds welcomed their first child over the holidays, but Lively's good friend and "Sisterhood of the Traveling Pants" co-star Amber Tamblyn was the last to find out.

Tamblyn recently told People magazine that when she went to visit Lively, she had no idea there would be a baby present. "I went up there and I didn't know, everybody knew but me, and she does that shit to me," Tamblyn said. Apparently, Lively texted Tamblyn about new wallpaper that she was anxious for her friend to see. But that wallpaper turned out to be a newborn. "And I went up there, and there was her baby," Tamblyn said. "That bitch! She tricked me!" Tamblyn joked.

Tamblyn said that all of the "Sisterhood" girls have seen the baby. "I'm very excited for her and Ryan, and to be an auntie," Tamblyn said. "All of us are godmothers, so we are very happy."

Lively recently told People about how thrilled she is to be a new mom. "This is the happiest time in my life," she said.

For more, head to People.

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