Selma Blair and her boyfriend, fashion designer Jason Bleick, welcomed their first child into the world today – a little boy named Arthur Saint Bleick. The baby, which was more than 2 weeks overdue, weighed in at 7lbs., 12 oz.

Blair announced her pregnancy in July but kept the sex of her baby a secret until delivery. “I’m not going to say what it is yet. Hopefully, it’s one or the other,” she told PEOPLE Magazine at the premiere of "Girl Talk." The 39-year-old actress is best known for her roles in "Cruel Intentions," "Hellboy" and "Legally Blonde."

We wish Jason & Selma all the best with their new son!