Rachael Leigh Cook and Daniel Gillies welcome baby girl Credit: Jennifer Graylock/FilmMagic

It's a girl! Rachael Leigh Cook and husband Daniel Gillies have welcomed their first child together! (On Friday, another outlet erroneously reported that the Perception actress had already given birth to a baby boy.) The proud dad announced the happy news via Twitter on Sunday, Sept. 29.

"It's a girl. The tiny new empress of my everything," Gillies wrote. "She's immaculate. We're delirious."

Us Weekly first broke the news in May that the couple were expecting. "I've been hiding my rapidly growing bump while shooting but this kiddo is vying for screen time," the 33-year-old actress said at the time.

Gillies, 37 added: "A lot of people are asking whether I'd prefer a boy or a girl. In truth, it doesn't matter to me -- I just can't wait to meet little Keanu Robocop."