Image Source: Getty / Donato Sardella [1]

Tiffani Thiessen welcomed her second child, a baby boy, on Wednesday. She announced the exciting news via Instagram [2], sharing a sweet photo of her 5-year-old daughter, Harper, holding her new baby brother, writing, '"Yesterday Harper got a little brother! We are so excited to introduce Holt Fisher Smith. Our perfect sweet little man. #weareblessed #familyoffour." The former Saved by the Bell [3] star and her husband, Brady Smith, revealed that they were expecting [4] back in January; Tiffani later brought her baby bump to The Tonight Show for a hilarious Saved by the Bell reunion [5], wearing a maternity version of her Bayside Tigers cheerleading uniform. Tiffani joins a group of former '90s stars [6] who have welcomed their second children recently; Rachael Leigh Cook and Jennifer Love Hewitt [7] also gave birth to baby boys, while Tamera Mowry brought home a little girl [8] this week. Keep reading to see Tiffani's sweet snap.