Melissa Joan Hart, best known as the star of TV’s Sabrina the Teenage Witch, and her musician husband, Mark Wilkerson, welcomed their first child, a baby boy, on Wednesday, PEOPLE has learned exclusively.

Mason Walter Wilkerson was born at 4:19 p.m. in Los Angeles, and weighed in at 9 lbs. exactly.

“He was a little stubborn, but all is well,” the actress tells PEOPLE. “Everyone is well and we are all relieved.”

When news of the star’s pregnancy was reported last June, her mother, Paula Hart, told PEOPLE, “I’m thrilled to death. I’m so excited. Melissa is feeling great. So far, so good.”

At her Nov. 28 baby shower, the mom-to-be and 35 guests gathered at Paula’s San Fernando Valley home to decorate onesies, eat homemade lasagna and cupcakes and marvel at her bump. “I have this enormous belly,” she told PEOPLE. “Everyone tells me I won’t make it to January.”

Hart, 29, and Wilkerson, 28, the lead singer and guitarist for the hard-rock trio Course of Nature, met when she introduced his band at the Kentucky Derby’s Mint Jubilee cancer fund-raiser in Louisville, Ky., in May 2002. “It was love at first sight,” Hart said. “We made eye contact, and my knees got weak.”

They were married in Florence, Italy, on July 19, 2003. Since Sabrina had ended its seven-year run just three months earlier, the couple were eager to focus on their future. As Hart told PEOPLE, “we can start enjoying the rest of our lives together.”

- people online

woah
congrats lol

Her husband is cutie. Hope her son turns out to be the same (:

ooo, thats cool. never knew she was pregnant. lol.

Ohhhh! Clarissa! lol. I used to love 'Clarissa Explains it All'...well, congrats to her. :]

She really let herself go during the pregnancy. But congrats to her.

^^ That's so mean. LOL!

Congrats to them.

she's pretty and her husband is a cutie so hopefully the baby will be good looking. and healthy and stuff.

Oh. Uhh... Congratulations to her then. Haha. I didn't even know she was married let alone pregnant. :P

I didn't even know she was pregnant...well congrats to her.

That's really sweet :) I like what she said about going weak in her knees when she first saw her husband. lol (/hopeless romantic katie)

I had no idea she was pregnant, but congrats to her!
man seems like such a long time ago when I used to watch "Sabrina the Teenage Witch" & "Drive Me Crazy" lol

me neither. haha. but congrats to her!

lol i used to love clarissa explains it all and her friend that always visited her via his ladder and her window. but congrats to her!

^Haha yeah, and that music would come on whenever her friend came. Lol.

Aw, I knew she was pregnant..congrats to her!

i didn't even know she was pregnant
well i'm happy 4 her

whoa, i didnt even know she was pregnant, let alone being married.