Tiffani Thiessen and Brady Smith shared adorable new photos of their son Holt Credit: Courtesy of Brady Smith/Instagram

Too cute! Tiffani Thiessen and Brady Smith couldn't help but share new photos of their adorable baby on Instagram this week.

The Saved by the Bell alum, 41, and and the Young Adult star, 43, welcomed their second child together, son Holt, last month. Thiessen and Smith, who tied the knot in 2005, had their first child, daughter Harper, in June 2010. 

Holt appears to be quite the happy baby in the new photos, soaking up time with his parents and older sister. Smith posted one grinning photo of the cutie on Monday, Aug. 3, in which the baby boy is gazing up at Thiessen. "Smiles for Momma. #happybabyboy," he captioned the shot.

In another image, 5-year-old Harper cares for her little brother, holding him in her arms as she feeds him from a bottle. 

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"'Mommy, Daddy, no help please, ok?'" Smith wrote, quoting his daughter. "'I got it." - Harper (Big Sis)."

It's been quite a celebratory few weeks for Thiessen and Smith, as they recognized their wedding anniversary just days after the birth of Holt. The former child star shared sweet wedding photos with her husband in honor of their 10-year anniversary on July 9, and penned a touching tribute to him.

"10 years ago today I married my husband," Thiessen captioned the wedding pics. "I could not have picked a better partner to go thru this journey we call life. He's an amazing husband and a beautiful father and I could not feel luckier having him by my side. I love you babe. Here's to 100 more anniversaries together. #10years #weddinganniversary."