is officially a proud mother of a baby boy. The Liz Sherman of "" gave birth to her first child with fashion designer boyfriend, Jason Bleick, on Monday, July 25, her representative has confirmed to PEOPLE. Weighed in at 7 lbs., 12 oz., the newborn is named Arthur Saint Bleick.
The 39-year-old actress has kept the sex of her baby a secret ever since she announced she was expecting in January. When met at the premiere of "Girls Talk" back in March, she told Access Hollywood, "I'm not going to say what [the sex] is yet." She then joked, "Hopefully, it's one or the other. Who knows these days!"