Tiffani Thiessen just gave birth to a son, and the former Saved By The Bell actress shared a sweet photo on Instagram of the baby with her young daughter.

Thiessen, who is married to actor Brady Smith, gave birth to daughter Harper in 2010 and announced earlier this year that she was expecting a little boy, saying Harper was excited to find out they were adding to their family.

“We are excited to announce the news that we are expecting. Harper could not be more thrilled to have a sibling and a playmate,” Tiffani said.

Thiessen said this year that while others wanted to see her have a second child, Harper was the one who pushed for it.

“She puts more pressure on me than anybody. She’s definitely ready to have a brother or sister,” Tiffani said.

Yesterday Harper got a little brother! We are so excited to introduce Holt Fisher Smith. Our perfect sweet little man. #weareblessed #familyoffour

A photo posted by Tiffani Thiessen (@tiffanithiessen) on Jul 2, 2015 at 12:38pm PDT

Thiessen reunited with her Saved By The Bell co-stars earlier this year for Jimmy Fallon, something that’s been in the works for years and made fans deliriously happy. For her return as Kelly Kapowski, Thiessen showed off her real baby bump and earned cheers from the audience.

Tiffani also spent time with Elizabeth Berkley on her own when she asked her to be a guest on her cooking show, Dinner At Tiffani’s. The duo had a blast making grilled ciabatta with ricotta and snap peas, roasted chicken with an orange glaze, watermelon-champagne cocktails, and orzo salad with corn, among other things and Instagrammed their time together.