Alicia Silverstone just celebrated her first Mother's Day as a mom -- as she reportedly gave birth to her first child last Thursday!

The 34-year-old actress, most famous for her role as Cher in "Clueless," and husband Christopher Jarecki welcome a baby boy last week.

They named their son Bear Blu Jarecki and he weighed in at 7 lbs., 15 oz.

Alicia's rep tells PEOPLE "Mom and Dad are completely in love" with their "beautiful baby boy."