Formerly known as Tiffani Amber Thiessen, the 41 year-old actress has been in the spotlight for the better part of her life, starting her career during her teenage years, when she played Kelly Kapowski in the 90s high school show "Saved by the Bell" and then starring in "Beverly Hills 90210" - but these days, months after her most recent show ended, her primary focus is Tiffani Thiessen's family.

In fact, after announcing her pregnancy last March, now Tiffani Thiessen's family, comprised of her alongside husband Brady Smith and 5 year-old daughter Harper Renn, has all welcomed a new member at the beginning of July!

According to Us Weekly, Tiffani Thiessen's family announced the big news through the actress' Instagram, as she posted a sweet snap of little Harper holding her new baby brother, Holt Fisher, as the two smallest members of the family looked positively adorable.

"Yesterday Harper got a little brother!" the actress gushed on the social network, announcing Tiffani Thiessen family's big news. "We are so excited to introduce Holt Fisher Smith. Our perfect sweet little man. #weareblessed #familyoffour."

The Daily Mail reports that Tiffani Thiessen's family is following the latest Hollywood trend: raising their children by themselves only with the help of family members, without a nanny, which can be fairly difficult with the busy schedules of celebrity parents.

Other celebrity parents that are currently following the no-nanny trend include Ryan Gosling and partner Eva Mendes and Justin Timberlake and Jessica Biel.

In any case, these days Thiessen's schedule is much more relaxed, as she recently finished "White Collar," which co-starred Matt Bomer. In the past, she has spoken about wanting to spend extra time with her family now that she's off work for a while!

According to Entertainment Tonight, Thiessen and Smith, also an actor, have been married since July 2005.

Congratulations to Tiffani Thiessen's family on their new bundle of joy!